I'm quite impressed with live.com's search results page.

They've used AJAX to allow the user to continue moving down, with new results loading in off-screen, ready for the user to scroll to.

I'm also quite fond of the new design - very smart, and completely free of clutter, hopefully it will stay this way.

They've introduced a slider to adjust how much additional information each result displays.

The results it's producing seem a little odd though.

For example, I wanted to look up the line of code for recalling a item from my resources in C#, so I searched:

google: "c# embedding resources" (24,000,000)
live.com: "c# embedding resources" (25,000)

All top 10 hits of google were relevant. The first 4 hits on live.com were unrelated to my query.