We had a conversation in IRC about this, but I'll echo it here. MeeGo is a reference OS for various devices such as IVI systems, netbooks, handsets and a few other devices. It consists of an optimized Linux distro with a specific graphical user layer on top which varies depending on the device. For handsets the graphical layer is done using a Qt-based toolkit/framework called MeeGoTouchFramework (MTF).
There still aren't screenshots anywhere :-(
I realise that part of meego is "it's a toolkit, you can make it look like anything you want", but the same is true of qt, wx, fltk, and others - and those all have screenshots [linked].
I have to say, I still don't "get" meego; what does it offer that I can't do with debian, knoppix, or arch [just for want of some examples]?