How do I forward my SMS Messages on the Xperia X10?
If you are Using the Default SMS application the Xperia X10, just open the thread which contains the Message(SMS) you want to forward, and Long Touch ( or Long press ) the SMS and it would pop a new menu which would contain the Options like Forwarding, Copy Message Test, Delete Message ( Delete that Single SMS ),etc. I guess the steps are similar with other Popular SMS Messaging Apps on your Xperia X10, like the HandcentSMS.