On-site mobile SEO
• Using 100% valid XHTML 1.0 code is the best practice as mobile search engines may however have more trouble digesting invalid code.
• It is likely that WML will be phased out in the near future, so play wise and safe. If you validate, the mobile search engines will not have any trouble with you.
• Follow accessibility best practices as they will ensure that your content is accessible to anyone regardless of their platform. This would include mobile users as well as the mobile search engines.
• Follow the traditional on-site SEO best practices, and which by now you know by heart. Major keywords for the title tag, H1’s and body text, keyword rich anchor text for internal links, and allow the link wheels to spin around.
Getting Spidery and Indexed by Mobile Search Engines
If you are wanting, your site to be indexed by the mobile search engines, they must come to know about it first. Make sure to submit your sites to major mobile search engines for some swift recognition. It would be a wise idea to see that each of your pages is having at least one incoming link.
List of mobile search engines
The following search engines are the major players in mobile search at this point of time.
• Google XHTML Mobile Search from Google Mobile
• Yahoo! Mobile
• MSN Mobile Search
• AOL Mobile Search
• Nokia Mobile Search
• Technocratic Mobile
• 4INFO Mobile Search

My sincere suggestion is, do not wait for the “year of the mobile” to arrive. Google has left us with a hint as early as the beginning of this New Year, 2010, when they decided to launch Nexus One. Get onto it and start creating some meaningful and genuine mobile related content. Apart from the adult stuff, we are having today, there is more that we can now do to make mobile SEO more relevant and effective in the days to come.