I really enjoy the autosuggest and some of the other AJAX/RSS features.

This is eerily similar to my tool, WPLookup http://wplookup.com -- you can see it's favicon in the screen shot of Firefox in this post.

I launched this last month and released a second version last week. I suggest checking it out if you're interested in these types of tools.

In the spirit of open source, I like it, esp. if it wasn't a borrowed idea ;p