I got hooked on FriendFeed and wanted to create a different Web based interface. I wanted to be able to scan through several posts, open their links automatically, comment and “like” quickly, and have the list auto-update to show new posts. For some reason, I haven’t found a desktop client that I like (I tried Twhirl and AlertThingy). The clients are a pretty efficient way to comment (if you can find the right button), but I find notifications too disruptive, and neither client auto-opens links.
Disclaimer: Works best in Firefox, lightly tested in IE 7 and Safari.