Hello Python-dev! we have a document on PyPy's interpreter and translation features that might be of interest to you - we target it at language implementors in general: Includes a discussion on our .NET and also the emerging Java backends, as well as our RPython -> Javascript webapp generating experiments, on security relevant taint propagation and transparent proxies ... IOW quite a bag :) We'd be very happy about feedback and opinions/questions (preferably until Monday, 19th March) http://codespeak.net/pypy/extradoc/eu-report/D12.1_H-L-Backends_and_Feature_Prototypes-interim-2007年03月12日.pdf best, Holger -- merlinux GmbH Steinbergstr. 42 31139 Hildesheim http://merlinux.de tel +49 5121 20800 75 (fax 77)