At the Kona meeting (just finished) the standard committee made very significant progress on threading for C++0x -- voting in a proposal written by Howard H, Beman, Anthony Williams, myself, and others -- subject to wording changes to be made by a small drafting committee. Basically we were in agreement on semantics, but even after several late night drafting sessions people weren't happy with the standardeze. While much of the proposal is based on Boost.thread it has some serious departures in the way mutexes and guard interfaces work, it's use of date-time types for clock/timing interfaces and such. At this point I feel it would be very important to have a reference implementation widely available to Boosters and others to play with so that any issues are shaken out while there's still time tweak things. Howard has been maintaining a reference implementation, but this is a call out to the broader thread development team (not sure who all that is now besides Anthony) to consider how we might formalize this into Boost.threads. Thoughts? Jeff