Since I just got my new computer 2 weeks ago I might pay the $10 for the new OS
It's worth it to do that so that the next time a new OS comes out, you don't have to pay for a more expensive upgrade version (correct me if I'm wrong, but the 'upgrade' only works for the most recent OS? I could be completely wrong).
When I first got my MacBook Pro, a new OS came out about a month later and I paid my $10 and was glad I did. It's a very reasonable price to have the latest and most efficient version of the software.
Oh I agree, my concern is more "will my CS3 still function as well" than cost though. I am buying CS4 within a month or so hopefully so maybe it's not that big of a deal???
^^I read an article about CS3 and some other programs possibly not functioning as well with snow leopard, but I think that the article I was reading was really just trying to bash Apple in any way that they could.