Well im sorry SGS users/lovers but im going to go and buy a Nexus one today. No doubt SGS is a better device, but I feel that the Nexus one is more "solid". By that I mean it has better development, less bugs and the first for updates. Thats just my opinion anyway :)
I think it'll just take a bit of time for the SGS community to pick up - I think Samsung is going to sell a huge number of these, so the community will get better.
I was going to get the Nexus one for the same reason but I didn't like the digitiser problems some people were having with it.