TreasureMyText stores your text messages online
TreasureMyText is an online service that will store all of your text messages online: the good, the bad, the mundane, the unintelligible. Simply create an account and forward any text message to their standard rate numbers (available worldwide), and your message is forever immortalized.
True to web 2.0 standards, TreasureMyText also has a sharing feature called TextStream (which definitely reminds us of Twitter). You can choose to share your text messages with absolutely everyone (and you wonder why the internet is sagging under the weight of needless information?), or you can pick and choose friends and other members to share your messages with.
TreasureMyText also offers simple folders for organization, and an easy-to-use contacts list.
If you're wondering where the iPhone fits into all of this (since you can't forward text messages with the iPhone), the programmers at TreasureMyText have created a mobile client for your jailbroken iPhone that will allow you to archive your SMS over EDGE and WiFi. They have also stated their intention to create a more robust iPhone application with the release of the official iPhone SDK.