A little late on this particular bandwagon, but I've finally signed up over at blogrolling.com. A new side panel has been added for my "techroll" - that is, the technical sites that I frequent and subscribe to via NetNewsWire.
I've also installed NewsMonster on my linux-on-the-desktop box, err, laptop... though it doesn't appear to be working quite yet. I'll dig a little deeper later. Right now my mail filter process is just about done and I'm itching to see if I can get this stuff into Evolution.