We came in through Dulles international airport with relatively few problems. Security didn't seem to be much heavier than previous flights. We took South West out on a 4 PM flight, with a landing at 6:50. Luggage pickup was quick. The shuttle from the airport, for which we were charged nearly $20, took around 45 minutes, as it dropped people off at every hotel on the strip. I highly recommend, if you are traveling with more than one person, that you take a cab.
Check in time at Treasure Island was horrendous. With about 30 people in front of us in line, and only 3 people working the desk, it took about 45 minutes.
More coverage will come about the opening day of the expo soon!