First: the site's design and the way it's build is ways better than the old sparkat version, I really like it.
The videosection and all the media stuff is cool, just like before. The site is giving me some trouble with clicking links, especially on the 'home' site (when it's still loading), but that might happen because I'm using Opera and not Firefox or IE.
The embeed facebook,yootoob,myspace links and all that stuff is really cool.
A chance to select different background colours for the boxes and perhaps different styles available to choose would be great, but I guess it's some kind of destroying the mood and style you want to achieve with the site (for example advertising 8-bit rebellion now ;) ).
I havent had a proper look around yet, but one thing I immediately notice is that its set to automatically email you when someone else joins the same group as you! Same as when someone replies to a discussion you participated in
I joined the LPU group on here and now have around 100 emails telling me every new member that has joined after me... not good! I think by default that should be set to 'off' :P
Other than that, I like it so far :) Nice work