Hello, I've been working on a small library on top of boost::thread. The basic premise is to practice concurrent programming by having the threads communicate only through message queues. With the library I am able to send messages of any user defined type (as long as they are copy constructible and assignable) between threads to different queues. The library has 2 types of queues, an in memory_queue implemented simply with a std::deque and a native_queue. The native_queue can provide a wait handle so the queue can be waited on with some platform specific methods. It is also possible to send "sync" messages that will force the threads communicating through the message queues to rendezvous. This is useful e.g. when a thread needs to request some additional information before it can continue processing. regards, Sami