You are welcome to submit questions in advance however I would recommend waiting until you have watched the Keynote presentations first (as there may or may not be interesting stuff announced *wink* *wink*).
Please use this format when asking your question:
@<guest's name> - <your question>
@Scott Guthrie - I heard a rumor that your trademark red polo is actually a white polo that went through the wash with a pair or red sock... IS THIS TRUE?
And if you do choose to use Twitter (it's free and only takes 30 seconds to sign up) please include the #ch9live hashtag in your tweet.