Poll: What threading features do you use?

As we are working on the next set of features for Typemock Racer, the threading related test framework, I think it will be nice to know what features and thread constructs people use the most in their applications. The poll below uses flash, if you can't see it.

Please fill it in and we'll see what people use the most! While I'm here, I may as well ask you another couple of questions that need re-examining. Which mocking framework (if at all do you use?) and which unit test frameworks do you use?