Although blogs are a good way to see if someone is a good fit, you're probably excluding a lot of sharp people if you use that as your first filter.

I'd also argue that how people fit in is important. If you don't care about fit when you hire, you end up with a company of individuals instead of a team.

I do agree that the best interview is one where the candidate actually does the type of work that is to be expected of him/her.