Robert_Charlton - 7:17 pm on May 3, 2012 (gmt 0)
Great reference, engine, and thanks for posting it. I've been wrestling with this too, and in fact I've been hesitating to move ahead on a particular site redesign project because I've been wanting to see where the multiple device issue is going.
With regard to Google, the approach taken will not only affect design, but also the technical aspects of crawling, indexing, ranking, and redirects. As I read it, the Google article suggests that Google would like to resolve the issue of mobile redirects by eliminating them.
In the discussion below, I provide links to a lot of the discussions we've been having in that area as of Sept 2011...
Mobile Redirect Header Response and SEO
Note, btw, the thread that's linked to in our Supporters area, where we discussed Responsive Design, also back in 2011.