I've developed a fever over the past week. I found a program called MacPorts, an open-source project aimed at making other open-source projects available to people.
It all started when I was looking for a way to run Windows-based programs on my Mac. There is a program called Wine out there that "tricks" the program into thinking the necessary components are there in order for it to run. I'm not totally sure how it works, but it was suggested as a good alternative to mirroring or even hard-drive partitioning. (If that sounds good to you, there is a great step-by-step tutorial here).
Long story short, I had to install a couple of other programs (including MacPorts, from which all other installations were completed), but I didn't end up using Wine. I did, however, begin to play with MacPorts and some of the open-source freeware available. I've caught the bug.
I've always had an interest in astronomy, but living in Seoul (population 18 million) makes it a little difficult to see much more than Jupiter on an extremely clear night. In my toying with MacPorts, I found an open-source program called Nightshade, which is by far one of the best astronomy simulators I have ever seen. I am now thinking about proposing a new astronomy class to be offered at my school because of the capabilities.
Like I said, I've caught the fever.