Don't worry - more orientation slots are on their way...  We're really excited that we got over 60 orientation sign-ups for MIT.nano in less than 24 hours, leaving us temporarily out of stock. But, we plan on adding more slots for August (e.g. the weeks of Aug 12, 16, 19 - plus a more regular schedule for September and on), to accommodate anyone who didn't get a chance to sign up yet. But it may take a few days for us to sort out our calendars and logistics. Once we add new time slots (tentatively we may post these later in the evening on Aug 6), we'll post a note here and also email out to fab-users.