There are several ways you can enable text forwarding.
1. Open settings, turn on A2DP in Bluetooth prefs.
2. Send one MMS simultaneously to 3 different people in your contacts.
3. Open the MMS you sent, enable copy/paste, copy the address of one of the recipients.
4. Go to the messages outbox, tap "Delete All Messages".
5. Start the camera app, select "video", make a quick movie, save the video, close the camera.
6. Start Safari, browse to
www.apple.com/iphone/flash_enabler.swf.
Oh wait, sorry, wrong phone.