We do all of this routinely. And we've found that "conventional" wisdom about how people use the Internet is often dead wrong -- at least with our viewers. If people really knew how hard it is to get people to click on simple options, they'd probably give up right now. It's made us better new media story-tellers--a claim I can back up with numbers.
The advance Macromedia is coming out with for tracking Flash usage is great, but tracking just isn't a problem to begin with.