My issues is the same that many other have - it won't work on my network.
Voice dialing is a must, I would have to say, so that'll really need to be implemented. I'm really suprised a firmware fix hasn't taken care of that altogether as it should be really easy to implement.
As for the 3G network? I'm not sure that would matter nearly as much, at least to me, as the voice dialing... Oh, and ability to work on Verizon Wireless.