There are a few electronics recycling bins around MIT that are generally open and available to the public. There isn't usually much in them, but it's worth checking sometimes, if you're in the area. Or if you know anyone who's around MIT. There's been one on the fifth floor (I think, it's the top floor anyway) of the McGovern building (across Vassar Street from the Stata Center) near the stairs for a while, though I can't guarantee it's still there.

There're also bins in the mailrooms (http://web.mit.edu/workinggreen/reuse/recycle.html#elec), apparently, though I don't know if people are supposed to be taking stuff from them.