I literally just finished editing my review of Talk Triggers and Patrick wrote an excellent post that goes nicely with it.
In his book Purple Cow Seth Godin talks about making a product that's remarkable. To be remarkable, Godin says, is to be “worth talking about. Worth noticing. Exceptional. New. Interesting.”
Talk Triggers is about building something worth talking about. It gives to a framework to define a trigger and then a process to build one. You can make sure you don't miss the review by subscribing to Should I Read It.