update: UberGoogleGeek Kevin Gibbs blogs about it. Aaaah. that precious 20% time. Chris Wetherell also mentions a google thread.
Those google guys. so hot right now.
Google is testing a suggestion interface. It's neat. Apple Safari users, hit command-option-a while interacting with the page :) It looks like it uses various remote scripting tricks.
While a neat feature, i can see it be a nightmare to scale for such a large user base. You're looking at an HTTP request on each keystroke. GAH! On the other hand ... this might be a more realistic feature for someone much smaller to look into.
I've been meaning to add support for remote data sets to this guy. Here's to additional motivation.