Today the World Web Consortium released XHTML-Print as a W3C  
Recommendation. Designed for printing from mobile and low-cost devices,  
the XHTML-Print page description format satisfies print and display needs  
in the absence of a printer-specific driver and where variability in the  
formatting of the output is expected and is acceptable. The work is based  
on XHTML-Print written by the Printer Working Group (PWG), a program of  
the IEEE-ISTO.

http://www.w3.org/News/2006#item166 

Best wishes,

Steven Pemberton