Here is a question that was asked during the PSoC World Virtual Conference that was held during December 12-13, 2012.
Q: "Where can I find a list of I/Ps available for Designer?"
A: I/Ps for Designer (a.k.a. User Modules) are available as configurable, pre-characterized blocks that implement a range of functions and peripherals.
More info on User Modules - http://www.cypress.com/?id=2522&rID=40633
We are hoping that these question/answers will be helpful for those who could not attend. If you have a question about PSoC 1, feel free to start a thread and pour in your doubts.