The only way I can think of is to use a non-cabled solution. There are a number of mobile companies that offer net access over a data card or mobile phone. The only problem is that this type of solution is generally significantly more expensive than using a land line dial-up or broadband system (especially as most mobile net access solutions are charged by data transfer rather than time). Another option, though one that isn't truly mobile, relates to the use of Wireless broadband. It's not a common system, in fact I think it can be counted as extremely rare, primarily because it is something that is still in the proving stages (kind of like power cable broadband). This is more of an option for the future (say 5 or more years in the future at a guess). My recommendation is to go with the mobile solution. I'm not sure about the U.S, but most of the UK operators offer either standard data or 3G options (with the 3G choice being much more limited in terms of coverage). It's expensive, as I've said, but it does work. (In case you are wondering I have seen a 30kbs link using GPRS, and a 200kbs with 3G (that's up and down link), though this does vary with coverage).

Air Cards have become affordable. Check with your wireless cellular company. My Verizon is not the fastest in the world if you need to download anything of size, but works great for e-mailing and browsing. As a Verizon customer it is $59 a month. As a non customer it is $79 a month. Also, if you use your cell phone company, you do not have to buy the special cards which lock you into a 2 year contract. Buy a phone with the office kit which connects to your computer through USB and the internet becomes a feature of your phone which can be turned on and off as needed without penalty if using Verizon. My costs: Cell phone which I needed for service. Motorola Phone Tools $39 (one time charge) Office Kit $49 (one time charge) Service $59 per month added to phone bill. I do not recommend Sattelite as when I checked into it, the costs isnt prohibitive except it charges you for bandwidth usage past a fixed point depending on the service you choose. If anyone else reads this and uses this feature or service it would help us all if you list your service and its costs.

In the US, don't forget that many truckstops and fast food restaurants have free wi-fi (though unsecured), and many campgrounds have wi-fi for a small fee. (I'm using one now)

Go to the nearest provider.www.myofficephonesystem.com might help you. They have advanced technology that will cater your communication and internet needs.

Get a laptop computer with an air card.

Miss ginashulz is right. Why not try the one she recommend.

Use a laptop with a wireless connector mobile.

satellite, mars radio, its your motor home, might as well take the sicko side.