However, this time the timing is perfect actually, since both Ubuntu and Gnome seems to be in a bit of a clash thus giving birth to the Unity desktop (which was going on for some time actually). So if you have those kind of questions then this is your moment!.
I was reading one of his previous interviews and although you just can't judge a character based on a single interview, but he seemed like a pretty cool guy who likes Drum’n'Bass (he's actually a DJ!). Anyone who has a taste for music are usually easy to get to know and deal with, don't ya think ? ;-).
So if you have questions concerning Ubuntu and its future, etc then why not use this opportunity!. It will be head at 16 UTC and go to this his blog post for information about how to see and register yourself with the web cast.