Important information for speakers missing

I actually had three questions (one of them has already been answered by you). Will we have a computer at the presentation room in order to show the slides and possible examples online using Wikipedia? This information will be crucial. My second question is more related to Wikimania itself: when are we supposed to receive an e-mail with payment instructions? I registered myself a week ago and I haven't received any message yet. I just want to make sure that time is not up. Thanks.