Jason Calacanis' $10,000 bounty for a better Technorati 100 is quite amusing. Not only for the cheekiness of the thrown gauntlet, but the comments which illustrate the many facets of this challenging problem.
As an added bonus (is there any other kind?) I stumbled upon PubSub's linkcounts, another interesting posting flow tool and their site stats feature. Neato stuff, but I bet since their data is feed based, you'd see significant variation from something like Technorati, whose rankings are based on scraping site front pages. That and PubSub seems to conflate blogs with last 2 elements of domain name, which is a bit problematic...
I'm wondering if there isn't a Google moment about to happen somewhere out there. A couple of enterprising computer science grad students pull in an idea from another academic discipline (percolation theory?), engineer the hell out of the implementation, execute cleanly on the user interface, and ride off to fame and fortune.