Actually, about 2 weeks now. My boyfriend found it on Slashdot, and introduced it to practically everyone at Xythos Software, a software company in San Francisco. They all seem to really like Code Monkey, and Skullcrusher Mountain.
He was even goint to work one day from the ferry and humming "Code Monkey" and an Audio guy who rides the boat with him recognized it, "Hey isn't that Code Monkey?"