How best to deliver notifications to various IM / notification services?
问题 We have a website which provides time-critical updates on changes in the value of FOO, and want to deliver notifications of new data via various IM protocols. For reasons best known to themselves (and their parents), the FOO-traders use Yahoo! Messenger, MSN, gTalk, AIM, you name it. They want to receive their updates on their desktops so they can buy and sell FOO realtime. We want to deliver the updates to them via the various networks, without investing a huge amount of time in supporting