The last version of [app]ABContacts[/app] (1.4.2) supports external apps to send emails, sms or call a contact. This means that it can now send SMS to groups of contacts if the external app allows it. If you're a developer of an email, sms or phone app and you want to make the app compatible with ABContacts please contact me. If you're an ABContacts user and you want your favorite email, sms or phone app to be compatible with ABContacts please tell the developers to contact me. Currently the only app compatible with group sms is biteSMS (only for jailbroken phones).