More Coolness with XmlHttpRequest

Since I almost exclusively use an aggregator these days to get my info from the web, I'm probably late noticing this. Anyhow, I just noticed today that foO implemented a pretty cool blog archive search on his site. Go to the 'Live Search' area of the home page and type in your search and watch the page dynamically return search results right underneath! Pretty awesome, I think. So seeing this got me thinking, "What other cool applications are there for XmlHttpRequest?" We've already seen it used for e-mail (and spell-checking) with GMail and OddPost. We've seen it used for type-ahead with Google's Suggest, and now search results on foO's page. Does anybody know if MSN Web Messenger is powered by XmlHttpRequest?

I'm seeing it in use a lot more lately, and I like it.