Google suggest is damn cool! You just start typing what you want to search. It offers to complete your query. This sure saves a few extra keystrokes, and also avoids typos. Google IS God!
Update: Zef Hemel has a interesting discussion on why web appliation that we write normally suck, and that Google is able to come up with very rich client applications like Gmail and Google Suggest. He also proposes that an opensource community could develop all needed widgets necessary for developing rich web apps. Sounds a very interesting idea.