In the early days of weblogs.asp.net (when it was still called "DotNetWeblogs") the main page had a list of all the bloggers sorted by number of posts and last date. That made for a good way to find out which blogs are most active/have the most content/are worth subscribing to (true, some blogs are unique - small amount of posts with big value, like Chris Brumme's blog).
That's gone, I have no idea why, but if you wanted a list of top blogs to subscribe to independently of the main weblogs.asp.net feed, Jon Galloway posted the output of a little .NET code he wrote to calculate the blog worth of every feed on the weblogs.asp.net site.
He then sorted the list by order of "worth". What you get back is is good way to get the "essential" list of bloggers which have content/links/track backs which may suggest they are worth subscribing to.
Here's the final results, with the full result set posted in Jon's post, along with links (I'm glad to be among it).