1)Buying it a launch. No doubts.
2)Super Mario 64 DS and possibly Madden, which is VERY strange because I haven't been interested in Madden since Sega Genesis days.
3)Not waiting, but if I was to wait, it would be for more 1st party titles or innovative 3rd party.
4)Well, my main reasons for wanting a DS, software wise, follow with Animal Crossing and Mario Kart. I wasn't looking forward to Metroid or Super Mario 64 DS, but now that I know they aren't just ports (Metroid Hunters is amazing, I can say that much), I'm happy with whats at launch, I only hope for a solid online plan.
5)Absolutely no interest whatsoever in the PSP. I'm quite angry that some developers won't make games for DS because of the PSP. However, at the same time I am happy because Nintendo will be competing, so we won't get all these half-assed ports (SMA1,2,3 and 4).