Now, I'm not a big fan of IE. I was willing to leave it on my desktop for Boycat's Mum to use, but she likes Firefox now, too. But work uses IE exclusively, and the product I write for is delivered to the user's browser over the intranet, so maybe we can start planning for some of these features that are finally coming to Internet Explorer.
I could see us delivering news of updates via RSS. I can't wait for tabbed browsing at work. I'm not familiar with the thumbnail extension for Firefox, but I've downloaded it and I'll check it out tomorrow.
But of course, given the time it takes our I.T. people to security check new software for use on the network, it probably won't be until IE8 is out.