A lot of people have shown interest in the Multimedia usability project and it turns out that many questions are similar. I would like to answer as many questions as possible, but on the other hand I also have to optimize the time devoted to such activities. A good venue for this kind of Q/A is the Wikimedia "IRC office hours", a weekly event during which a Wikimedia staff member answers questions on IRC.
As a consequence, I will be available on IRC to answer questions related to the Multimedia usability project this Thursday, February 4, 2010 @ 1700 UTC. You can use the fixed time world clock to check the time in your timezone. Please join us in #wikimedia-office on Freenode using your favorite IRC client; you may also use web-based clients (check out the IRC office hours page on meta-wiki for more information on how to do that).
Looking forward to your questions.