http://home.gna.org/xmpp4r/ Use your favourite jabber/XMPP server and you immediately have a messaging system with authenticated entities, status updates, queueing of messages when a server is unavailable, etc. And even better, you can add your servers as contacts in your favourite chat client and send them instructions yourself!
on 2009-03-28 04:53
on 2009-03-28 04:56
Here at Twitter we use an in house, open source solution, called Kestrel which has great performance. http://github.com/robey/kestrel/tree/master Robey Pointer wrote it, and it's quite good. It uses a simple memcache interface. Set = enqueue. get = dequeue. -john