If you listen to Mobile Tech Roundup, you'll know I picked up EVDO a few weeks back. (And if you don't listen to MoTR, well, why aren't you?).
I am addicted to EVDO. It might not sound like such a big deal, but it's incredible when you no longer have to think about having a high-speed connection. It's a life-changing event the first time you sit in the doctor's office and you're online. Suddenly, the wait isn't such a big deal. I take the bus instead of the subway now because it's no longer "lost time" - I can sit there the entire time checking e-mail, etc.
As much as I hate the idea of carrier lock-in with my laptop, it's making me think long and hard about a lot of the notebooks released recently with embedded WWAN support. The ThinkPad T60 and X60 are both available with embedded EVDO receivers (there is a slight bulge though). If the new ThinkPad tablet has EVDO, I might be willing to overlook the lower resolution screen.
Of course, an always-on EVDO connection is a great complement to FolderShare. Like FolderShare, EVDO is a disruptive, life-changing technology because it eliminates yet another barrier.