It's been a long time since a new Android SDK has been publicly released to developers -- the last one was made available only to contest winners which made some developers feel less than appreciated. This comes right after the FCC approved the first Android handset expected to be released very soon by HTC.
The new SDK comes with a brand new interface that I think addresses a lot of the problems older versions had -- it's a lot simpler, and most things make sense, or are easy to figure out. The previous version was filled with usability problems that made the device pretty much useless.
If you are interested in trying out the device before buying your own, do the following steps:
1) Download the SDK 2) Unzip into a directory on your computer 3) Open the "Tools" directory 4) Double-click on the "emulator.exe" application
A simulator will open up that lets you play with the operating system -- mind you, there's not a whole lot you can do with it until there is some kind of way to find and install applications from some sort of application directory.
This release, according to Google, is very close to what the final one will look like -- the only thing left, likely, is finding and fixing bugs and security problems. What do you think of the new interface?