Well, of course the screenshots show applications running on top of GGI rather than GGI itself, but they demonstrate a few neat tricks that can be easily achieved with GGI.
From project leader Andreas Beck:
It demonstrates the new functions of XGGI and cube3d. It is a 4-headed XGGI server running on four of the cube's sides and two nixterms on the top and bottom ... :-) For the curious, I include the script that was used to set the stuff up:
Doom targeted at GGI. A perl script splits the display across different windows (ggi visuals), which is pretty neat (e.g. for multihead display).
GGI runs on iPaq and Zaurus.