The Snake3d site was updated with this news:

It’s been about 6 months since this code had originally left camp, and we’ve progressed a long way – levels, multiple OS support, textures, all sorts of nice stuff. But now where from here? It’s obviously quite unfinished, but what could make it better? I’m not opposed to entirely rewriting most of the code – remember this was originally written in about a week, so some places are going to break really easily.

Check out the new look on the site http://snake3d.sourceforge.net/phpnuke/