"Dual-selectable, not dual simultaneous."3.0 starson by m4ch4x0r
Pros: 2.4 and 5 GHz capable, which can help keep your G devices out of your N network.
Cons: For $90, it should be able to do more than just be a WAP, Gig-E switch, and basic router.
Summary: What to like - Wireless N capable, 4 ports of Gigabit Ethernet goodness, a decent design that can sit on a shelf or mount on the wall.
What not to like - You can't run 2.4 GHz and 5 GHz modes at the same time with this one box - to do so, you'd need a secondary access point to add that capability to your network (which means that end users migrating to wireless N would most likely be keeping around their old wireless G router to run in access point mode if the whole point is to run N devices at 5 GHz and G devices at 2.4 GHz). There's no USB port, eSATA port, or media card slot on the back of the router, which means it cannot be used as a file or print server. The internalized antennas, while stylish, limit the range of the device before you'd need to resort to repeaters or secondary access points throughout a premises; this is a common problem with most consumer routers these days, however.
Overall, it's not a bad little entry-level device. However, Linksys would be wise to add dual-band capability and a USB port to the next revision of this device.