While I don't think they'll necessarily add PS3-specific servers, they might add a handful of new servers at PS3 release just to accommodate the impending population spike. These would eventually have a blend of PS3 and PC players, but it would be a "fresh start" for everyone on those servers.
This is one of those things where if enough people ask SE for it, that's how they'll do it, but otherwise it might not occur to them.
Edited for grammar.
Edited, Jul 14th 2010 8:49am by TraumaFox