I was hunting him down a few months ago, and found the same info as Andrew posted - He moved, he's working retarded hours, and isn't online. He used to be online all the time in one form or another, and then went MIA.
I also agree, that this does seem very unlike Dan, but he is (or was) being hunted down by another forum member for a similar reason. If you want, you can PM me your information, and I can text him, and let him know your situation.
As a member of the moderation team, I do want to say that this type of behavior is not acceptable. I find it embarrassing we have to hunt down people from our own team for things like this.