The C++ committee hasn't decided whether to do a TR2 or to move directly on to the next standard. Either way, there will be a call for library proposals, but the details will be up in the air at least until the next meeting, which will be in Kona, Hawaii, in February. For the moment, the term "TR2" is being used as a surrogate for moving the standard library forward regardless of exact details. In discussions, library working group (LWG) members have made it clear they want a filesystem library based on Boost.Filesystem, and a networking library based on Boost Asio. Individual members of the committee have voiced interest in other Boost libraries, large and small. If you are a Boost developer (or user), and there is a Boost library you would like to see proposed for TR2, now is a good time to start thinking about writing a preliminary proposal to the committee. The point of such a proposal is to gauge interest before putting in a lot of work on a full-blown proposal only to find the LWG isn't interested. See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1810.html for the original TR2 call for proposals. While the details will change, it is still a reasonable introduction to what is required. A preliminary proposal would just say "To be supplied" for the "Proposed Text for the Standard" section. It is very helpful to do at least the initial presentation of such a proposal in person. That said, John Maddock and Peter Dimov had many proposals accepted for TR1 without ever attending a standards committee meeting. If you don't plan to present a proposal in person, the best bet is to ask someone who is familiar with the library to present it. Feel free to contact me publicly or privately with questions about proposals or information about attending committee meetings, --Beman