Last year I started using TLS encryption on my email server with a self signed 365 day certificate. Since that time I started using CAcert for certificates so when my self signed certificate expired early this week I was able to modify the instructions found on this website to use a CAcert certificate on my Postfix mail server.
For the September 2005 issue of Popular Science the magazine hired Jonathan Coulton to write a freely downloadable soundtrack. Being a pretty rare thing to see a soundtrack to a magazine I decided to check it out and it's a good thing I did. The songs are an absolute hoot and the PopSci page led me to Jonathon's website which has even more songs free for download all licensed under the supurb Creative Commons license which is even better! I've got an email in to Jonathan now to see if I can purcase FLAC versions of his music, in the meantime I suggest you check his stuff out. Described as geek pop be sure to listen to "Ikea" and "A Laptop Like You". Of course if you too enjoy his music I encourage you to buy it and/or make a donation!