On some DVD extras (I can't remember if they were from Tom Goes To The Mayor or Awesome Show.. I'm thinking 1st Season of Awesome Show) Eric specifically mentions his wife briefly. So he was married at some point. But I don't believe he is with her anymore. He's either separated or divorced, I'm pretty sure.
In fact now that I think about it? I'm fairly certain that he mentioned a wife on the 1st Season Awesome Show DVD extras and he referred to a girlfriend in the Tom Goes To The Mayor DVD extras. So I'm thinking a long-term relationship turned into a marriage sometime between 2004-2007? Unless he is extremely good at hiding her, judging from his postings on Twitter, it's pretty safe to assume he's not in an active marriage today.