I just installed IE 7 for XP onto my work laptop and fired up Pluck, my RSS reader, half expecting it to crash or break. Thankfully, the only thing busted is launching Pluck from the systray. If you load IE manually, everthing works just fine. Not only is IE 7 cool on it's own merits but Pluck + tabs is just awesome. Now I can use the "lauch in new window" icon with impunity.

And yes, I know Firefox has had this for a while. I tried to use Firefox for a while, I really did, but I just don't like it. It's hard to say why.