Do you include external links on your mobile site?
If the answer is yes, then the next question is, do these links go to another mobile site?
An easy way to optimize your site for SEO is to make sure that whenever possible, you are always linking to a mobile web page.
For example, many of our clients incorporate YouTube videos in their mobile site. YouTube makes things very easy as they do automatic mobile detection for any link that you set up. However, if you use their actual mobile URL (m.youtube.com/yourvideohere...) when setting up an external link from your MoFuse site instead of the regular desktop URL (www.youtube.com/yourvideohere...) this will only help improve your mobile SEO ranking.
The bottom line: use a mobile URL for any external links, whenever you can!