I know there are a variety of different tools out there that allow you to create your own personalized start pages (I currently am using PageFlakes for this purpose) but there are a few new ones I recently read about on Paul Hamilton's great blog that I wanted to pass along. MyClusta and Tizmos allow you to create your own start page with the sites you visit most often represented visually as thumbnails, screenshots or some other logical image. These are both different from an RSS feed reader in that you don't have to pick just sites that are generating a feed but instead the sites you like to visit often or that you use frequently with your students. Tizmos provides a screenshot, updated every couple of days, for each website you choose to include while MyClusta allows you to pick your own image for each website if you so desire. Essentially, these tools let you take a favorite list of websites and represent them visually on a single page as shown in the screenshots below.
And from Tizmos: