You can't forward any text in the send of getting a text and sending it on to someone else.
You can however send the same text to multiple recipients...just tap the To: area and then a (+) sign will show up to the right. You click that and you will see all your contacts. This is the only way I know how to do this which is a huge pain in the ass if you want to send to more than a few people. Would be nice if you could select a bunch and then have them all added at once...maybe one day.