I’ve been working on a mobile plugin for WordPress that swaps in either mobile adsense automatically, or can swap in AdMob if you configure it to.
http://wordpress.org/extend/plugins/mowser-wordpress-mobile/
There’s info about advertising on our publisher wiki.
I’ve been working on a different version that uses a content adaption service I’m working on called Mowser:
http://wordpress.org/extend/plugins/mowser-wordpress-mobile/
We work around the indexing problem by now allowing search engines to crawl the adapted version and inserting the alternate handheld link into the desktop version to notify indexes of the alternate version. We have a bunch of info about publishing for mobile on our publisher wiki.
Happy you like it, great post! I don’t think there’s a good way to get Google Analytics working well for mobile. However, with the AdMob id in you should be able to get stats for the mobile version out of their interface.