One option which is new to the conversion market but is being used extensively in commercial buses for bulletproof in-motion internet access for multiple users (up to 45 passengers) is Hobnob. I use our coach (1999 H3 Vantare) both for work and for play and need robust in-motion internet service for the work part of the day that importantly works in a VPN environment without interruption. Upload/and download speed is consistently strong (modest T-1 speeds) and Hobnob is the only (moderately priced) service that I've found that achieves this in a VPN environment (short of mobile satellite which is prohibitively expensive). Hobnob uses multiple air cards from separate carriers, a multiplexer and a router to constantly seek out the strongest signal automatically, combined with high performance antennas on the roof of the coach. After researching many different options and purchasing a couple of different sets of equipment for our needs (and being disappointed), Hobnob finally provided the solution. we were looking for. The combination of 4 cell cards and Hobnob's active signal management service costs between $300.00 and $500.00 per month so it isn't the right solution for the casual user, but if you need business grade internet service while in motion, based upon our experience, this is the ticket. If this is what you are looking for, you can try hobnob.com for more info. or email me for more detailed questions. I'm a new member and wouldn't usually post such a long message, however the in-motion internet challenge has been a big one for us and if we can save a fellow member from the process we went through to arrive at the solution I'd welcome the opportunity to help.