I don't know about you but, I'm a sucker for new (and improved) programs on my computer. This is what keeps me downloading and trying out most anything I can lay my hands on, from alternative office suites to mail servers.
Lately on Linux, I've been trying out the Xfce desktop environment, and I have to say, on my RAM-deprived PC (128 MB), it totally kicks ass. It's fast, clean, minimal, but it looks incredible, especially with the GTK+ Smokey-Blue theme.
I've also been setting up a mail system in Linux that uses MrPostman to download all my Hotmail messages from the Hotmail site, classify it into different categories using POPFile, and deliver it to my electronic mailbox. It's working pretty well so far, and POPFile is getting more and more accurate in its classification. My only problem is the lack of mail to download and test the setup! But what the heck.
Finally I've got a mail system that comes about as close as I've ever gotten to my own POP account with an ISP.