I was reading the WSJ this weekend and ran across an article about Uppidy and its BlackBerry. They have created a free service that backs up your text messages from your phone and view them on their website. This lets you sort them and manage your messages and even share them with others. Right now the app only backs up your SMS since you have installed the app so older SMS are not backed up. After you install the app it will sync your messages at a interval you specify.