Yes, they were there.
The pre-seminar buffet was nearly the best part. Chris (Ripple) was clearly the most articulate person from the crypto-currency community and was respectful of the fact that it was a Bitcoin conference -- he also had an assistant give away 1,000 XRP to any and all comers. He didn't hit any new points and the whole conversation was really held at a beginners level. All questions were done through texting which really took nearly all energy away from the event.
The Stanford professor was really strong -- highly incisive and if there was video of her introduction that's worth your time. My main take-away, when the velocity of money is considered, Bitcoin could be deemed to be fairly valued. You'd have to see her presentation to dig into the criteria she used -- I didn't take notes. Of course, fairly valued today doesn't say anything about tomorrow -- i.e. if the velocity of BTC transactions drops then it's overvalued, etc...
The Winklevii were split as to whether it is a currency play or an infrastructure investment thesis. Since they've made a unrealized mint on the currency play already, it's easy to see how that point of view could dominate.
The Goldman guy from Coinlabs played his cards close to the vest. While he talked a lot, there wasn't a lot of take-away there (sorry dude.)
The Silicon Valley Bank compliance officer really didn't have much to say other than to note that her team spent more time on understanding the businesses brought to them to see where they would fit within the existing compliance regulations than they did on actually assessing compliance itself. And of course, she indicated that from her conversations, the IRS (or FInCen I was distracted at this moment) is less interested in stopping BTC than regulating it.
Kashmir Hill was fun. She briefly went through her week living on Bitcoin and did a good job as moderator.
Worth $30.00 plus travel time -- not really.