There have been many devs who worked on regnum. That video Slarti posted is pretty neat (watch Surak blasting out code). Over the years some left, some are working on other projects.
I've never been at NGD HQ, but as far as I know the only guys working on regnum since last year are Adrian and Frosk. Adrian (=kailer=damocles) is lead developer with Frosk to help him out. They do use NGD's resources as in art guys and support crew but that's about it. Just these guys working their ass off to provide frequent updates
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Chilko is co-founder and big boss of NGD studios, haven't seen Ponter in a while.