Personally, even all considered, I would wait until it is over. It's a safe bet, and from my POV it's just flat out the right thing to do. I could never date anyone knowing I was some other mans wife at the time of said date. I'm not judging you, honestly it's not my place to. I'm just saying what I myself would do. I have a guilty conscience that prevents me from doing alot of things others would consider okay. I would advise you simply to not do anything you might even possibly regret later...know what I mean? I just wanted to throw that out there bc you seem unsure of whether u really want to date before it's completely done. I hope the divorce goes as painlessly as possible, and you can get on with your life however you so choose.
