[boost] Anyone working on containers with "a better allocator model"?

Not strictly boost related but I thought I should ask in case anyone here is currently working on or know of any collection classes with a "boost like" license that use an allocator model similar to the one described in: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1850.pdf The main ideas being to decouple the allocator type from the type of a collection and have per instance allocators. Surely I can't be the only one with a need for this? Does anyone know if this was ever proposed to the standards committee or was it just an idea up for discussion back in 2005? _____________ Patrik Ellrén