There are good things and bad things.
Well congrats on the look, it's really slick. That's the only plus I can think of.
On the "bad" side ... well the site is basically useless to me. I can't find anything I need.
The tag column in the search results is broken, or I just don't get it. You have to scroll up and down for dozen of screenfuls just to add/exclude tags. I get tags beginning with "A" when I click on "i-q".
The urls are kinda cryptic, tags are referred to by id# while one of the beauty of tags is that you can use them as a key.
There's dozens of redundant tags.
The interface for choosing between hide/show for tags is simply /wrong/.
Search results are not very helpful.
Still no search plugin automagically offered.
And using "tabs" to hide information in the project page is *really* bad user interface, I hope I'm not hurting your feelings, but seriously, why do I have to click to see what licence a project is under? Why not just scale the text down and keep all that info on one page? If I have to scroll a little it's no big deal: I, just like 99% of your users, have a scroll wheel, and I just need to hover over my browser window to use it. To use your tabs, I have to click on an area 1/100th the size!