Hmmm, after getting blasted on on the "call to action" thread because "everyone" is having problems, I do see some successes here.
I am posting from my tethered BB 8830 right now which took about 5 minutes to set up.
A point here that everyone seems to have skipped is that this is potentially a carrier issue. I suggest a poll of what carriers are having problems and which are not. I am on Sprint, no problems.
Another point is the configuration being used. Remember, despite the fact that the carriers do sell you an unlimited data plan it does not mean they want you to use it that way. Many have different AP's depending on the device and I know for a fact that ATT/Cingular does throttle your connection speed depending on which AP you are going through.
Lastly, depending on the device, you may or may not have high speed access. Most EVDO phones are not Rev A. So if you compare the speed of a dedicated EVDO modem to that of an EVDO phone on the same network the speeds will not be the same.
And to those that accused me of trolling, look at my post history - I don't troll.