[boost] [Pool] Arbitrary sized elements?

Greetings: I was wondering if they were any intent to add a derivative of Boost.Pool which will handle types of arbitrary sizes. It won't benefit from speed optimization but certainly from its members functions such as is_from(), obliteration properties and independent memory area. This is basically were shifted_ptr is heading to because allocated blocks from new_sh() cannot be mixed with global allocations. If there isn't any intent to do so then I'll experiment using mmap() functions and Win32 variants. Thanks, -Phil