Hey srjk, I write for Gigaom and I'm hoping to talk to some developers about the news. Up for chatting about why you saw this coming awhile ago? if so, drop me a line at carmel.deamicis@gigaom.com
However, this is great news :) It will just make linkedin irrelevant quicker. They are moving away from being a social network for professionals to being a source of sales intelligence. Most users wont be too happy with that. And, unlike facebook, linkedin is much easier to migrate off of. Really, linkedin was the first big professional network, not the last one.
IMHO angellist is more in line with what the future of professional networks is.