Mail More Photos is a new jailbreak mod in Cydia that aims to get rid of the five photo per email limitation on iPhone, iPod touch, and iPad.
Mail More Photos allows you to attach as many photos as you want to email. The default limit of 5 photos is removed from the Albums and Places views. The title bar is also updated to show the total size of all selected files.
The added value of showing how many photos you've selected, along with the total size of the photos you'll be emailing is really great. Mail More Photos requires iOS 4 or higher, and is the perfect extension to an already useful feature.