vBulletin 4.1.2 includes:
Mobile Style
Integrated lightweight mobile style.
This mobile style is optimized for all webkit mobile devices in most languages, and will auto-detect if a user visits the site from a mobile device and render the site in the mobile style.
Please note: Currently this style is included in both the vBulletin 4 Publishing Suite and the vBulletin 4 Forum Classic, however the Blog and CMS of the Publishing Suite are not currently covered by the mobile style - the mobile Blog and mobile CMS styles are currently in development, and slated for a future release of vBulletin. Both the CMS and the Blog will still be accessible via mobile devices, but will render in their respective web application styles.
--------------- Added [DATE]1296835458[/DATE] at [TIME]1296835458[/TIME] ---------------
will evidently be in the new version coming out u may want to just wait and install that see if it is what you want i think it is