I'll be getting White. I didn't think I'd get back into the series but once you're in it, it's really hard to keep away. It's almost like World of Warcraft, though I've successfully been off of that for 2 years and going strong.
I hear through the Pokemon Dream World it will be possible to capture all of the pokemon, but it's completely up to the developers what they put up and when or something to that extent. Either way, the game itself doesn't even expect you to catch them anymore, as with D/P it was all about how many were seen.