Protopage is a very Web 2.0 version of a personalized start page with freestyle drag-and-drop customization.
MyYahoo lacks some of the customization and features of other start pages like Netvibes, iGoogle and Webwag, but it makes a great start page for those who love the Yahoo web portal.
Netvibes is easy-to-use and is more flexible than other custom start pages, but it is not quite as pretty as some of the newer start pages.
Keeping with the philosophy that less is more, iGoogle is rather plain compared to other start pages. But, it offers plenty of handy gadgets, and with its tie-in to Google Docs, it might soon become the most productive start page.
A relative newcomer to the scene, Webwag is off to a good start. The ability to capture portions of web pages and put them on your start page via Widget on Demand is a great feature.
If you want something pretty to look at, Pageflakes is a good choice. It has a sleek design and offers a host of components called "flakes" that add to the productivity and fun.