Meh, sorry guys... there's actually a lot going on around here aside from just the launch. An unfortunate situation led to us making a decision to leave our current DC on short notice. Yeah, bad timing and all.
Anyway we had to migrate our web services to a pair of temporary servers while we wait for our new cluster... and... well... they didn't hold up so well under the load this morning.
That's why the v3 installer and our web site weren't working. (Helpdesk/billing services are hosted separately and weren't affected.)
The issue with the demo site was unrelated, it was actually up but its DNS entry was lost in the migration. DNS is fixed now, but while it propagates you can access it by IP at
http://174.142.232.235:2199.
We should be up and running on the new cluster by the end of the week, and then it'll be smooth sailing... I hope.