A startup looking for a Ruby guru is advertizing on YouTube instead of Monster or Dice.
This is a very interesting thing. A little while back I blogged about how it's a good sign if a company's seen your blog and/or code you've written for open-source projects. The reverse is also true. It's a good sign if a company's showing you who they are before you even meet them. Web social networking startups should use Web social networking; it's common sense.
Imagine, for the sake of argument, that this becomes a growing trend; that a social presence on the Web becomes a crucial part of business for both companies and individuals. Certainly, my blog's helped me market myself as a programmer, and it's also put me in touch with people I'd want to hire if I were in a hiring situation.
If you really want to fry your head, then for a vision of what this can look like, check out Joi Ito's presentation last year at the Chaos Congress on World of Warcraft. Joi Ito's a real thought pioneer, and he says that if you look at World of Warcraft from the right angle, you'll see the networked workplace of the future.