Sorry to be critical but the initial design looks a little plain to me. It doesn't grab my attention. This:
http://web.archive.org/web/20070303200242/http://mootools.net/ ... grabbed my attention. Especially the main menu. The main menu is a big part of what drew me to Mootools Back then, I hadn't seen anything like that before and I thought to myself, "I want my web sites to be able to do stuff like that" So my suggestion is be eye-catching and rather than just links to demos, actually use Mootools on the web site.
