Patience is overrated......
Other than a camera (which I don't care about, but which I'm sure will be along), this thing does everything I want it to do. OS4 will be available this fall, adding even more functionality. I'm having a BLAST with it right now, and I can tell you that when the newer versions come out, I won't regret having bought the first iteration, it's such a full featured product now!
Much like my iPhone. I have a 3G (not GS). I'm quite happy with it. I'll upgrade this summer, but I wasn't itching to upgrade as soon as the GS' came out. I'll upgrade the iPad in two years probably.
I am, though, quite the spendthrift!