I think you need to tweet at them or leave it on the Facebook wall or something. It's quite confusing that you need to send the questions beforehand - I thought as it would be live it would all be happening then? It's more exciting that way.
Anyway, it's nice to have something that will bring all the fans together regularly. I was hoping for something like this - maybe a weekly podcast or something like that, but this is better as it's live. Hopefully new MV treat every week = fan love for MV grows = fan community gets bigger/stronger = bigger forum. At least I'm hoping it turns out like that. :P