I wrote this in Python on App Engine, reminding me once again that there is a lot you can do with this platform.
Unfortunately, this site has somehow become popular. I have not idea why or how since I never told anyone about it, and it has a fairly obscure address (anonymizingproxy.appspot.com). I say unfortunately, because, since I keep this app in the free limit set by App Engine, it runs into it’s free limit very quickly every day – and then it just displays an error when browsing to it. I don’t make a dime with it, so I’m not going to increase the limits.