I couldn't figure out how to forward and SMS text message, so this came up in my search in the HTC Droid Eris forum and the procedure is the same on the Hero.
Thought I'd share here:
You may view the full discussion in the HTC Droid Eris forum here:
http://androidforums.com/htc-droid-eris/21615-how-do-you-forward-message.html
Thought I'd share here:
How do you forward a message?
Is there an option I don't see to forward a message in either Handcent or the native messaging app?
To FW an SMS, you do a long press on the applicable message and it will give you a menu of options; one of them being FW.
You may view the full discussion in the HTC Droid Eris forum here:
http://androidforums.com/htc-droid-eris/21615-how-do-you-forward-message.html