Current state of Allocator design

[Rene Zwanenburg]

A few months ago, I remember reading in a thread in this group 
that Andrei is working on an Allocator design for the standard 
library. I'd like to know if this is still actively being worked 
on, and if so, if there's a (rough) ETA.

The reason I'm asking is that I'm working on a piece of code 
where I really need to have control over both object lifetime and 
memory layout. I could come up with some allocator design which 
will suit my needs for now, but if there's a standard design 
coming out soon I'd prefer to use that instead.