Don't listen to anyone - this is a hardcore Apple forum, where people pay attention to the release cycles and every little detail about any Apple product.
Fact is, you bought a great computer that will be able to last you at least three, four years so enjoy it!
BINGO! Great points.
I have some friends that bought a 20" White iMac G5 about 3-4 years ago. To them, their computer is still "new" and is a wonder that they enjoy using and discovering every day. They are oblivious to the changes and new models that have come out since - they simple don't track those kind of things. Most people in the world are probably like that, but most people in here are not. The OP should keep that in mind when reading all the "wait" posts.