Yea WAP 2.0 can help, WAP development has gone beyond just WAP 2.0. Mobile phones now support xhtml,chtml and may more. WAP application now are database driven and even supports WMS, javascript , Ajax, flash lite etc.
If you want to lean its better for yo to start with WAP2.0 as seun said but if you want to develop a professional WAP site its better you look for a developer.
Oleku
www.oleku.org