Been having 3G issues here too, in southwestern New Mexico, on all of my VZW devices (DX, BB 9650, and MiFi 2200).
VZW used to be rock solid out here - seriously, I once had 3 bars and 2Mbps of 3G goodness, 10 yards inside of a friggin' mine shaft.
Lately though, I can't get 3G even if I stand on my roof and genuflect towards the tower.
It got really bad a couple of weeks ago. Called VZW support and they put me on a different CDMA SID. That seemed to solve the problem for a while, but yesterday I was back to 1x (and even no-x) for most of the day. CDMA SID had not reverted to its old setting, so I'm almost positive that this isn not an issue with my devices.
Then suddenly around 7pm, just as I was about to call VZW again (on VOIP of course, since I had no signal) BAM, 3G and full bars came back up and it's been that way ever since. :\
Anybody else having days like this?