I just spotted this piece of news mentioned in another thread, and thought it should be headlined separately in case in affects anyone's travel plans. Apparently in was announced in June, but maybe I was the last to hear!
From the Air Asia website:
AirAsia Ready to Transfer Flight Operations to Don Mueang Airport from October 1st, 2012
AirAsia affirms its readiness to transfer all operations to Don Mueang International Airport by October 1st, 2012. The airline assures Don Mueang Airport will be able to accommodate its growing fleet and provide its customers with the utmost satisfaction.
AirAsia has scheduled October 1st this year as the date when all of its services will be based at Don Mueang Airport. The airline's flights will retain their FD code and original schedules. Passengers who are affected by the switch to Don Mueang Airport, may alter their flights by either choosing another travel date on the same route either 7 days before or after their original travel date, at no additional cost. Passengers also have an option to convert the paid flight into credit shell available to be used within the next 90 days. The change options are only available to affected passengers who purchased their tickets before 26 June 2012 whose travel dates are from 1 October 2012 onwards. For further information and developments visit www.airasia.com or contact the AirAsia Call Center at 02-515-999.
There is no direct link to the article, but go to this page and search under 'June'.
And to answer all those anticipated questions in advance, no there isn't a shuttle between the two airports, and no your luggage on a connecting fight will not automatically be transferred. Allow at least an hour for transfer, take a taxi and beware of peak traffic mornings and evenings.