mTouchLabs (http://mtouchlabs.com) has announced SMS Export Plus 1.5, an update of their productivity app exclusively for iPhone and iPod touch. SMS Export Plus allows you to backup iMessages and SMS from your device to a Mac in .xls format.
Using SMS Export Plus, you can archive and maintain records of all your messages at a single location in Excel file. You can browse all backup messages in the .xls file. And you can filter messages by sender or sort messages by time and date.
SMS Export Plus 1.5 costs US$2.99 and is available at the Apple App Store under the Productivity category. It requires iOS 6 or higher.