After months of speculation, it's here: Amazon's tablet, the $199 Kindle Fire, was unveiled Wednesday.

Smaller and cheaper than Apple's dominant iPad, the Kindle Fire has a 7-inch display and runs on a heavily customized version of Google's Android operating system. The tablet offers Wi-Fi connectivity, but no 3G or other cellular connection. It also lacks a camera and microphone, two features found in most rival tablets.

But the Kindle Fire isn't trying to be an all-in-one computing device. A