Enter: the 3.5mm Stereo Plug/Plug M/M Cable (Cost: 80 cents).
This inexpensive little cable is the key to all sorts of adaptations that can allow you to enjoy Pandora, purchased music, podcasts (whatever) in the car, office, and at home. If you want to listen in the car (and charge at the same time with your micro usb cable), you can use your male-to-male 3.5 mm cable to connect to a Dynex DX-FMDC1 FM Transmitter USB Car Charger (Cost: $8.99, do NOT buy this at Best Buy unless you are feeling generous and want to make a corporate donation--they will charge you $50 for this transmitter). Or you can use it with an existing receiver or even an iPod speaker set in the office, at home, or wherever your little heart desires.
Check out my review of some other cool accessories here.
NOTE: The Dynex DX-FMDC1 FM Transmitter USB Car Charger I purchased on Ebay (the one I link to above) came with both a non-retractable 3.5mm Stereo Plug/Plug M/M Cable and a micro usb cable for charging. Neither were listed in the Ebay listing (unless I missed it), so this was a pleasant surprise. If you want both, I suggest buying the Dynex DX-FMDC1 first to see if you don't get everything you need with that!