Don't usually like to bump threads this old, but an update on the situation:
The DataJack 3G device has been, in a couple of words, totally unreliable. The unit decides to go into hibernate mode at random intervals - sometimes it will run for a couple of weeks before going kaput, and other times it will only last for a couple of days. In order to get it connected to 3G again and allow uploads to WU/PWS/CWOP, I have to physically reset the device - and often I can't go down to do that for weeks at a time. I've been through it all with DataJack service, and they didn't even respond to my last email because they've exhausted their options. The thing is no good for 24/7 usage.
So I'm looking now for something - anything - that will be reliable. Something that will only go down in the event of an extended power outage. The area is serviced by Comcast, and the house already has a TV package, so maybe I will just buy their internet service with it and get a modem and router. I see no real reason as to why that wouldn't be reliable; my internet connection at home certainly doesn't have any problems and just keeps on ticking until the power goes out (which is quite rare). Do you guys think this is the best option? I'm not sure what the cost will be, but probably $30-$40/month. Not cheap, but worth it (and I will make up a good chunk of that by not having to make as many trips down). Any other options I should consider before going that route?