i didn't attend Uptime Symposium, but I had a 11:30 meeting with Dell so I headed over to the hotel bar. 12 hrs later I was still at the bar.
One of the great things about the data center industry are the people. Some of the companies I was able to chat with are the following. I am sure there others I missed someone, and my apologies for not listing your company.
Compass Data Centers
Jones Lang LaSalle
Digital Realty Trust