Yes, there is a way to save and view your text messages but your options are few. I was in that dilemma a while back so I wrote a macro to resolve my problem. My macro WILL SOLVE YOUR PROBLEM. It runs on Windows and Excel. The macro parses an IPD file and produces various text file / reports based on the DBs it detects on the IPD file.
First, you have to backup your Blackberry phone with the Blackberry Desktop Manager software. You can get this free from Rim. DTM backup produces an IPD file. This file is used as input to my macro.
My macro will be provided to you free of charge. My services are free as well. Please contact me if you are interested in my macro.