Several shots showing Palm's WebOS SDK emulator in action have appeared on the Web this morning.
Fourteen screens in all, in fact, from Preferences screens to Synergy screens (Exchange! Facebook! Google!), Google Maps, the phone app making a call and more cards love. The subtle transparency is a nice touch, but obviously these screens don't show the true nature of the beast -- half of what's important about a device like this is how you get from screen A to screen B.
Obviously, we're getting close to that release date. Check out PreThinking's gallery.