http://blog.red-bean.com/sussman/?p=116
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today I want to plug a new bridge written by a friend of mine (Augie Fackler) who finally did it Right: he wrote a bridge called hgsubversion which (1) uses the actual Subversion API to pull history down (which is faster, more accurate, and long-term sustainable), and (2) actually knows how to push changes back to Subversion correctly.
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Если кто не знает: Ben Collins-Sussman - один из разработчиков SVN.