I have 3.8 vbulletin, and according to the site 3.8 is doable for the vbulletin Mobile application.
I want a basic mobile application.
Include login to PM other members
Front Page of application: search bar
Mobile Section - then if you pressed it, it would take you to 5 things including forum and the other 4 would point to other parts of the blog.
Message center view and send messages to other members on forum.
Submit a deal button: next page would go to deal description and place to upload photo.
Facebook Fan Page.
And on the Mobile section to have google adsense sprinkled.