Have you googled their screen names (if you remember any)? They could be using the same names for other sites.
It might sound stalkish, lol, I know. :X But I've done it & found my closest, greatest friend, who I never see. :D
I definitely miss the old Bolt. I have known so many people while I was on the old Bolt that I have missed keeping in touch with them. I would like to get a hold of them know just to keep in touch with them.