The interface on the Google service is identical as best as I can figure - does "Do no evil" include saying thank you to the authors of open source code?
I see a lot of differences; maybe they even recoded it from scratch. But it uses some interesting tricks I invented, and doesn't use the easy features that I didn't include. They definitely have at least seen the source code.
maybe they even recoded it from scratch
Even when Google buys a startup they usually rewrite everything.
I also wonder if "do no evil" includes not peeking at the fellow's gmail account.