This year at Summit we will use Groupme once again for those who are attending and who would like to be kept up to date and in contact with other 90 Minds members.
I want to add people to this earlier rather than later so that everyone gets used to the program. You can download Groupme from the app store.
You should especially get familiar with how to disable notifications, etc so that you are not awoken at 2am by any of us chatting off-topic during the conference.
Please let me know if you would like me to add you to a test Groupme prior to going live with Sage Summit 2013 group closer to the event.