OK, i signed up the mailing list, and got the source code. Had a bitch of a time trying to follow the instructions to set it up in windows, so i just rebooted o linux, and had it working in <5mins.

My next suggestion would be a tutorial on getting it set up in cygwin, which i guess would be a hell of alot easier then ath MSYS stuff.
After an intial perusal of the code, i heartily agree that the GFX is one of the major components to focus on.. The terrian code draws each tile independantly in a giant loop, it could be optimized alot as constant glBegin/glEnd calls like that arn't good for the throughput of the GFX card.
As mentioned in the future ideas, VBO/VBA's are the way to go. And while i'm on the topic of gfx, have you thought about implementing pixel/vertex shaders? ( i'd recommend nvidia's CG library/compilers if so, and yes it works on non-nvidia hardware too ).
So, i will poke around some more, and the next post i do will probably be in the dev forum ( if i'm allowed to post in there). I'd like to work mainly on the gfx since that is where my interest lies, but i'm happy to do whatever needs doing.
On a side note i notice alot of code mirrors some work i've done(the widgets for example have very similar code to mine), i guess there are only finite ways of doing code.
And finally, thanks for making me feel welcome, i hope i can contribute something usefull.