I recently spent some time debugging AJAX connections for a application I built for a client using Blackberry WebWorks (via PhoneGap) and jQuery Mobile. The app was already working great on iOS and Android, however my AJAX (XMLHTTPRequest's) were not working on Blackberry.

I gave a presentation to my local ColdFusion users group in December on Building Mobile Apps for iOS (iPhone, iPod, iPad) and Android devices using jQuery Mobile, and PhoneGap.