I'm looking at attending the Mobile Web Americas Conference and Expo (Oct. 2-4, Orlando, Florida), and, lo, I don't need to go (saving $1000, plus travel) because there is going to be one speaker there who is going to explain it all between 4:30- 5:00 on the first day of the conference--
A Power Users Perspective On Effective Mobile Web Design--Brett Tabke-CEO, Webmaster World.
Sadly, i cannot attend the event. I would love to hear what Brett has to say.
My experience is that outside of USA (where the carrier system sucks) and western Europe (where the cost remains high) the rest of the world has already discovered the mobile web in a big way and is using it in large numbers.
I intercept as many handheld devices as possible and serve them alternate content. WML markup is far from dead - most phones can read it - but the growth area is in HTML browsers with CSS support.
I understand why some webmasters might not want traffic from Russia, India, Africa and elsewhere, but I would guess that the if people there can afford the mobile web and choose to use it in large numbers then America is probably not going to be far behind.
The Nokia cellphone browser briefly eclisped Internet Explorer on one of my sites this year.
Next year it could be the Apple iPhone, or possibly the GooglePhone.