[UPDATE 2011.08.15] I’ve been considering my own response to the question. I don’t think pypy is ready but more importantly, taking a page from the erlang book, I’m still working on getting the code correct. And by the time it’s correct either pypy or some other speedup will be available (that does not require changes on my part)PYPY seems to be getting very good results not to mention performance benchmarks. The numbers are good enough not to ignore; specially with the results at quora. But is it worth taking a risk in production even though PYPY says they have alpha code?