IFTT (If This Then That) is a pretty cool site that allows you to build triggers between certain ‘channels’  https://ifttt.com/salesforce_chatter Have a look through the rest of the site too and you may get hooked, you can set up triggers from Chatter, but it’s not only for Salesforce Chatter functionality.

And here’s another site you may find useful… If you have questions or doubts about the performance and security of Salesforce.com then go to http://trust.salesforce.com/