A Review of Iconfinder | Search through more than 114,000 icons by Jim van Aalst

This design looks great, in fact, it looks like i would suspect when looking for icons.

The only thing that bugs me is the fact that you try to put everything so close together.

1- create space between the thumbnails on you second image

2- try to put as less as possible on the frontpage

That's it. Good luck with your great design!