Is intrusive_ptr the thing to use?

I need an object managed through a shared_ptr to be able to pass itself
(i.e., this) to another object which also expects a shared_ptr.  Is there a
preferred implementation technique for this when using the boost smart
pointers?

I think I've seen conversation in the past about deriving from
boost::counted_base and calling shared_from_this(), but I think I also
remember seeing comments to the effect that this is going away.  OTOH, I
know there's something called intrusive_ptr that's currently undocumented.

Should I be using one of these approaches?  If the answer is intrusive_ptr,
are there docs?  Should I roll my own?  What's a Booster to do?

-Greg

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