pageoneresults - 2:56 pm on Feb 22, 2011 (gmt 0)
How Mobile-Friendly is your site?
W3C mobileOK Checker
Is your Web site mobile-friendly?
Mobile will force many to start looking at validation and the use of proper markup. :)
In regards to the topic, personally I think quite a few will be relegated to using the m.example.com or example.com/m/ route due to the limitations of their platform.
Being able to serve stylesheets based on the UA seems like a much more efficient way to keep everything under one roof - One Funnel.