I thought Netvibes was probably the slickest Web 2.0 start page (web desktop?) until I saw Schmedley.
As you can see from the screen shot on the right, Windows Live Search still has some catching up to do when you search for "clinical cases"...
Read the full review complete with useful screen shots on Go2web2.
Schmedley: More Than Just A StartPage. Go2web2.
NetVibes is an example of what a web 2.0 desktop might look like
Pageflakes: The Teacher Edition. ScienceRoll, 12/2007.