I can't seem to find it now. There used to be something (I'm sure it was on tfwiki), because I was only just reading about it last year (due to him being at the non-BotCon event), but it musta been removed.
Ah well.
I'm not even sure why he'd be avoiding FunPub either, because he's never been a guest at a FunPub BotCon... unless he was meant to be at a previous BotCon of theirs (like in 2009 when it was last in LA), and the deal fell through.
I know a couple people who would know if that's true, so might ask them at BotCon.