Via SaurierDuval: The Museum of Modern Betas: Markus has done what any good compulsive would do and compiled a list of 200+ beta or pre-web web 2.0 style apps.
Mashable.com: Web 2.0 tools blog.
Chad Alderson: Google Map hacks collected-- here and here.
Society for New Communications Research: Jen McClure launches a research group.

There is no cat: RalphBrandi's blog, almost live from NY.
Jason Calcanis: Code thieves, you suck--when imitation seems to cross the line to rip-off. Bonus: Building a weblog ad directory.