Facebook flaked on sponsoring BarCamp, amazes me, but if we get a few more $300 donations we should be okay. If you know any company that contribute, please reach out to them to be a BarCamp Sponsor. Merkai is doing a great job on the solar wifi. Providing bandwidth for the Blue Chalk Cafe is the next challenge.
With 800 people, we may be a bit short on space during the day, mostly because a lot of the meeting rooms are small. We could have 20 concurrent sessions, so that and geography will make a lot of the ad hoc coordination happen in real time and it could be challenging. The weather be good, so there will be lots of hallway conversations outdoors.
We also need people to step up and be volunteers. Go find a place on the wiki or pop into #barcamp on IRC.
UPDATE: MindScience.org stepped up to cover half of the party expense!