Scott Allen sent me a note:

I'm writing to let you know that I've launched a new blog exclusively about LinkedIn, www.LinkedIntelligence.com .

For the mainstream LinkedIn user, LinkedIn's promise is all about efficiency - not wasting people's time with a bunch of interaction that doesn't actually get anything done. Those same people might be interested in how to use LinkedIn better, but aren't interested in diving into the middle of the multiple Yahoo Groups on the topic. They're also not into learning about every other social networking platform. That's who I'm writing to, though I imagine some of those power users will find it useful as well.

Anything Scott writes is worth a read.