Well Google wasn't too helpful, most results are commercial ones, maybe this is a niche that needs to be filled!
Well, years ago this may have been useful: http://www.w3schools.com/wap/default.asp But not anymore, with wifi, GPRS, EDGE & the advanced mobile browsers around today, handhelds can be used to browse almost as well as desktops. Here are somethings I can think of: Keep the page resolution flexible. (Changes according to browser's resolution) Avoid 3rd party media & plugins Avoid client-side scripting Format & align everything precisely. Use alt tags as images can take a while to load on traditional GPRS connections
How would you monetize a mobile site? Adsense text ads? I've never even browsed with my razr. I'm thinking of a gallery of downsized pics...and while the picture loads there is a tempting link waiting above or below.