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Three companies have warned users in the last 24 hours that their customers' passwords appear to be floating around on the Internet, including on a Russian forum where hackers boasted about cracking them. I suspect more companies will follow suit.

Curious about what this all means to you? Read on.

What exactly happened? Earlier this week a file containing what looked like 6.5 million passwords and another with 1.5 million passwords was discovered on a Russian hacker forum on InsidePro.com, which offers password-cracking tools. Someone using the handle "dwdm" had posted the original list and … Read more

It's time to pony up for prepaid iPhones, avoid password scams and drop that mayor obsession:

The iPhone is coming to Virgin Mobile at the end of June. But you'll have to drop a hefty $650 to get the iPhone 4S, since there's no two-year contract. Plans start at $30 a month. It's cheaper in the long run to go prepaid with this plan instead of spending $200 upfront and paying for a more expensive monthly bill for two years (but you'll be limited with talk minutes). Virgin is on the Sprint network.

If Android … Read more

Last.fm today urged its users to change their passwords because of a compromise that may be related to a huge password leak involving LinkedIn and eHarmony.

"We are currently investigating the leak of some Last.fm user passwords. This follows recent password leaks on other sites, as well as information posted online," a Last.fm blog post said. "As a precautionary measure, we're asking all our users to change their passwords immediately."

The blog post did not say how many users were affected or how the passwords were leaked. A Last.fm executive did … Read more

In the case of a major earthquake, terrorist act or some other disaster, cell phones will be useless, according to radio broadcasters.

Today at a congressional hearing in Washington D.C., broadcasters are expected to tell lawmakers that in emergencies, cell networks become clogged and have proven to be unreliable. What people need are FM tuners built into their handhelds that will enable them to receive radio reports.

That's what Jeff Smulyan, chairman and CEO of Emmis Communications, which owns AM and FM radio stations, is expected to make this argument when he testifies before a House subcommittee on Communications and Technology. … Read more

Long before Mark Zuckerberg dropped out of Harvard to found Facebook, Last.fm allowed music fans to keep an online record of the music they had been listening to in all sorts of music players, including iTunes, Winamp, and more. Last.fm's feature for this is called "scrobbling," based on the fact that it had acquired a company called AudioScrobbler in order to add it.

Now, Facebook does pretty much the same thing (except for with iTunes). All you have to do to send your playback history to your Facebook Timeline is use your Facebook identity to … Read more

Talk radio is careening toward a technology revolution and tech entrepreneur Michael Robertson may be the man to lead it.

Six months after launching Dar.fm, billed as a TiVo for radio, Robertson's startup has expanded the number of stations it offers listeners access to from 100 to 5,000. The company enables subscribers to record, in a way similar to TV DVRs, from among more than 20,000 radio shows, including Rush Limbaugh, and NPR's Fresh Air and Car Talk. The service then streams or downloads the shows to PCs, mobile phones, or set-top boxes.

Robertson has … Read more

Turntable.fm, the music-sharing service that took music fans by storm last summer, has signed licensing agreements with all four of the top recording companies.

Last week, CNET reported that the company was very near to becoming a licensed operation. Turntable.fm is a little bit Napster and a little bit online radio. Users can become DJs and share music within virtual "rooms."

Billy Chasen, the company's founder, made the announcement at the South by Southwest conference. According to a report in Billboard, Chasen gave some credit to the labels for making the deals.

"Our model … Read more

Turntable.fm, the service that allows users share music within virtual "rooms," is closing in on becoming a fully licensed service, CNET has learned.

A cross between Napster and radio, Turntable has already signed EMI to a recorded-music deal and is close to penning agreements with Universal Music Group and Sony, according to multiple sources with knowledge of the talks.

The music service is also still in talks with Warner Music Group. A spokesman for EMI declined to comment. Representatives from Turntable.fm and the other labels did not respond to interview requests.

A legal Turntable will potentially … Read more

Any audiophile would appreciate a portable Bluetooth speaker this holiday, but electrician-turned-artist Devin Ward has a more sustainable solution: he guts vintage clock radios and recycles them into desktop speakers for your laptop, smartphone, and tablet computer.

You probably have a similar tube radio lying around the house, but Devon does the work for you and rewires the internal circuitry, replaces faulty electronics, and even adds a 1/8-inch audio jack that lets you play music out of any device with a standard headphone minijack.

You're left with a speaker that probably won't sound as clear as the Bose SoundLink, but definitely looks better on a shelf and has the added benefit of an AM/FM radio.

According to Core77, Devon admits that the receiver may pick up some fuzzy static from electromagnetic interference, but if you're willing to deal with that and a $200-plus price tag, you may have just found the perfect holiday gift.

Check out Devin's Etsy store to buy, or click through the jump for more photos.… Read more