Sm1smom
Super Moderator
I have valid H1B visa until 2015. No need to restamp.
Still not advisable to travel???
I honestly can't make the call for you. However, I would be hesitant to undertake any trip out of the US, if I was in your position though, simply because the status of your I-485 application is a bit unusual. Ordinarily, there shouldn't be any problem traveling on a H1 visa with a pending I-485 (if an interview hasn't already taken place). I wouldn't be traveling without knowing the real reason for the delayed decision. So yeah, make the trip back to the your FO for an info-pass appointment. Who knows, you might even get your welcome letter and get everything resolved there and then.
Good luck!