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.

What about Caffeine? Why more of it? Well, it seems Google had enough of the Bingoo stuff and decided to launch a Search engine platform of its own. The beta phase caffeine is set to roll out very soon – and we can be sure of some excellent timing by the Google guys – No Google dance this time..

By some leaked noises from Google – Caffeine will vouch for a greater indexing speed, more accurate results (better spam filtering), more exhaustive results and some undisclosed features (very much expected).

So what was the need for another Caffeine Bing?

Ben Parr at Mashable has covered some known corners of the new Caffeine while trying to test it – and it seems that the new Google has scored over the old master on almost all of the accounts..

[A] Speed –> Caffeine is twice as fast as the old Classic for the most popular of keywords

[B] Accuracy –> Caffeine scored over the Old Google in terms of accuracy, although it does seem to be deprived of universal search features at this point. So, don’t be disappointed if you don’t find your favorite conference pics…It might be just on its way

[C] News results and current events have a much faster arrival in Caffeine as compared to the Old one. Bing is there but can be counted as ‘Also ran…’ for the time being.

[D] In terms Indexing size , Caffeine is miles ahead of anybody else in the playing field including its younger sibling…