Thunderbolt users will surely be wondering why they're not included in this first batch -- but for now it's just that fearsome foursome. Also included in Skype v18.104.22.168 is a UI overhaul and support for SMS messaging, neither of which suffers from any handset restrictions. Hit up the Android Market on your phone (the web Market still lists version 1) to get at the latest software.
[Thanks to everyone who sent this in]
Update: We've just spent a little quality time with Skype 2.0 and its newfangled video calling. Notably, we couldn't get a video call to work between the Xperia Neo and a desktop version of Skype (update: video chat between the Skype Android app and the desktop client has since been confirmed to work; thanks, David!) -- it was only possible to get video when calling between the Neo and the similarly compatible HTC Desire S. Once we did establish a connection, though, frame rates were smooth and buttery and the UI is simple and unintrusive yet offers quite a few functions. You can mute the call, choose between the front- or rear-facing camera, reposition the small window that shows your video feed anywhere on the screen, or -- with a double tap upon that window -- switch focus so that your own video output dominates the screen and your buddy's feed is relocated to the smaller preview. It's a great looking implementation of video calling, though we did only test it over WiFi, 3G performance may be materially worse.
Update 2: Skype's press release and demo video can now be found after the break.
Update 3: Though you might suspect otherwise given the Nexus S' inclusion, Skype has now confirmed that the Nexus S 4G isn't supported just yet -- it will apparently be brought into the fold with the next release.