http://wurfl.sourceforge.net/manifesto/
Transcoders MUST not reformat sites with URLs matching one of the following patterns:
m.*
mobile.*
wap.*
*.mobi
pda.*
avantgo.*
iphone.*
wml.*
wireless.*
xhtml.*
Note: In the spirit of erring on the side of non-reformatting, vendors are also welcome to support the following exclusion patterns, where "/" represents the first slash in the url PATH:
*/mobile/
*/iphone/
*/wireless/