They're great. I bought one last week as I thought my 3G iPod was dead. Used it over the weekend (on holiday to Ronda/Jerez) and it was ace. I managed to get my old iPod working, but I was going to keep the new one too until someone offered me a good price for it.
As for waiting - nah, if you want it, get it. The screens are ace - way better than my b&w 3G, and the battery life is good.