Also check out Dictionary.sc, great site by member here at Namepros. The dot.sc has traditionally been used for this kind of site and was getting a following that way -- a very simple interface, almost no art/graphics/text/ads, and they were usually some helpful tool like dictionary.
Was a lot of speculation on them a year ago, but they seemed to have gone nowhere price-wise yet; of course, if you have great keywords like yours you're usually still going to get low x,xxx for it, but so far I haven't seen any skyrocket into very high prices. Definitely a keeper though, and you'll make a great profit on it over your reg fee.
There were a lot of great dot.sc keywords still left less than a year ago and I almost took the plunge; should have, now that I see the bids some of them are getting on Sedo, ones that I passed up. You snooze, you lose. Glad you grabbed a good one.
If you check Wikipedia and other sources, you'll see the dot.sc is also used informally in many ways, to mean 'source', 'school', 'South Carolina', 'science', and a bunch of others.