"txtForward automatically forwards SMS text messages you send or receive on your BlackBerry or Windows Mobile smartphone to any email address you supply. Using txtForward to send your incoming text messages to email can be useful in a number of different ways... "
At first I didn't really see the point of this software, but one use would be to forward a text to your email account for archival purposes. The site has other recommended uses for it as well. It costs $7.95 and has a trial version available. It only specifies Windows Mobile, so I am not sure if it work on both Pro and Standard.