Thumbstrips appends a vertical bar to the bottom of your browser with thumbnails of the pages you've recently visited. Very handy for deep research browsing sessions.

Search Canyon Firefox ExtensionSearch Canyon augments google, msn, and yahoo search results with icons which provide a "more like this" function inline. Very handy. Stay tuned, we'll dig into the algorithm.

Flock is a Firefox derived browser with a nice RSS Reader built in as well as lots of good web 2.0 site integration including Flickr, delicious, etc.

The programmable web site is an amazing inventory of available application programming interfaces (APIs) and web mashups that use them.

The new Firefox is faster, better, and just about ready for prime time.

Some of the best features are the enhancements to bookmarks -- check out the tour from Dria.