okay, so i just uploaded a CSS file for all those interested. you should be able to find it at:
http://elgg.org/themes/files/9
since i never heard back from the elgg crew a while back, i went ahead and uploaded a slightly tweaked version of the current elgg.org CSS - it's named "CSS.css" so that you can edit easily, though if you want to use it on your own site, simply rename it CSS and remove the ".css" and load it into the default_templates folder where the old one is (perhaps back up that old one in case you wanna go back)
what does it look like? you're looking at it dude...a very clean, mostly white site with crisp coloration...there are also some standard widget containers/holders as they're used on the current elgg.org site so that you could, hypothetically, replicate that multi-box layout used on the home page of elgg itself...
as for that multi-column footer and so on, i've also managed to reproduce that along with some similar front page items (using the blog summaries from the newest version)...i can also edit those and upload if there's interest (you'll still need to scan to replace my site name in case i forgot a few)
oh, and btw, before you upload (!) be sure to pop in and do a find and replace with "YOURSITENAME" (with your own site, doh)
Keywords: css, style, theme