Where can I find a good reviewed collection of Twenty Ten child themes?

I am looking to extend the functionality and more importantly improve the design with post thumbnails on main page, beautify post metadata, etc.

If you know a good child theme for twenty ten, please share. Thanks.

My VoodooPress site is a twentyten child theme. Has some pretty cool functions going on behind the scenes. But pretty much every post on the site is about things to do with a twenty ten child theme. For instance, the things you ask about:

Working with thumbnails

Adding image sizes

etc. Hopefully you can find some help on there!