How would someone do that? for example:
Client* client = it->second;
where it->second is a boost::shared_ptr to Client error:
cannot convert `const ClientPtr' to `Client*' in initialization
boost::shared_ptr has a .get() method to retrieve the raw pointer.
Documentation here about when and why not to use it: http://www.boost.org/doc/libs/1_44_0/libs/smart_ptr/shared_ptr.htm