http://phonegap.com/ check that out. Here too
http://phonegap.com/start
Its quite possible to design it once with 95% compatibility. All modern phones, tablets, and devices [iPhone iPad Android Blackberry Palm WinPhone Symbian]have web browsers. We can code it in dreamweaver as a mobile formatted version of the site and insured multiple platforms can access it. Think of it as a web app. Here are some
http://phonegap.com/apps. Like wikipedia's app and many more. Its just mobile format that can resize for certain resolutions and omit things not needed and/or compatible.
We just give access to the forums and some extras gadgets. Think like local chatrooms, calorie counters, anabolic profiles and so on. All possible with java, jQuery and dynamic html.
Just trying to see what people can offer and/or any experience. I design stuff like this for my bacon. I need a graphic artist on board to do some PSDS based on certain resolutions so I can chop them up. Get a mockup together.