Ask HN: Please critique my webapp

Please take a look at http://taggl.net/ and tell me what you think. All comments are welcome, don't hold back.

I would also like to know which applications you think are missing and should be added.

There is an example search query on the frontpage, but this seems more suitable:

http://taggl.net/search/?tag=ycombinator+startup+school+2008

Thanks!