Check the about page for description of their service: http://ifttt.com/wtf

"when something happens (this) then do something else (that)."

Example triggers: "if I'm tagged in a photo on Facebook" or "if I tweet on twitter."

Example actions: "then send me a text message" or "then create a status message on Facebook."

Example channels: Twitter, Facebook, Delicious, Email, Phone Call, Weather, ...