Lance and Levi are great since they post videos too, which are fun. I enjoy Hincape. Zabriske is funny, not really "informative" if you will, but funny. VandeVelde had been rather talkative of late. Andy hasn't said much, but I'll keep following. Robbie Hunter isn't in the Tour this year but I follow him and he's always pretty opinionated and fun. I also follow the official Tour site which links to articles, and a writer for eurosport yahoo called blazing saddles (saddleblaze on twitter) who says a lot of things mainstream journalist never would. Some I may agree with, others I don't, but still interesting to read.

I'll post again after watching my twitter feed a little more and recommend any others. I follow Bobke, Phil and Paul, though they seem to leave most of their information for the broadcast.