I'm out in nevada/arizona camping on the dessert ... I'm sick of chasing back to town to go to the library to do email. do any of you have experience with an air card from either ATT, or Sprint?, or whatever company? so far I'm finding that many of the USB units they want to sell me won't work with our system only bill's stuff or MAC. any pointers, suggestions or tips are welcome. thanks, HARV, AI9NL washburn, wi currently in lasvegas,nv