If you’re particularly bored, you might want to check out SMSpeeping.com. I came across it while looking at the widgets you can add to a customized Google page. Basically, people sending SMS messages using programs, rather than an actual cell phone, can have their messages available to the world. The website says that the messages are posted on the site with the permission of the senders, but I wonder how many people really know that the programs are doing this.

Update (31 Dec 2007): I noticed the website is now just a domain squatter so I’ve removed the link.