Back from Comic Con tonight. Let me tell you about my Lego experiences...
First, to address what Kriterian above said, it wasn't the case this year. They had signs up "No Vendors or Exhibitors" for the exclusives. They didn't open the line until 9:30, and I was told they were pretty strongly checking to make sure it was only people that paid to get into Comic Con (vs Exhibitors) who were able to get in line and buy the exclusives. They sold out quick, though, so no exclusives for me.
I checked out the Lego store, and it looked fine. Nothing special there. About the only thing I would have considered was Tower of Orthanc, but I can get it at Legoland California with my annual pass discount, so I passed (plus, I didn't feel like walking around with that beast all day).
Walked around the floor. Some vendors were selling Ecto-1 GB for $75. I saw a couple of older SDCC exclusive Lego sets around (one was a 2009 Star Wars set, the other was an Indiana Jones set). A couple of vendors had polybags. I did see one vendor with a number of castle and vikings sets from the late 80s and early 90s.
Came across a vendor that had Series 1 minifigs for $10 each, and Series 2, 3, 4, 5, Movie, and Simpsons minifigs for $5 each. I needed a bunch from the first 5 series, so I spend my time smooshing those and picking out about 25 that I needed.
At 12:30, they opened up the line for the chance to win the Bard minifig. I went upstairs at 12:45. I saw quite a few people walking way with them. So, I started following the line to the end. I kept walking. And walking. And walking. After about 10 minutes of walking, and seeing the line continuing down to the marina on the backside of the convention center, I gave up. I decided any money I'd make on that single figure wasn't worth my the hour or longer that I'd be standing there, waiting for the chance to win. And, if I didn't win, I'd just be upset that I wasted the time. So no figure for me.
And then the final capper - in the rush to get my kids out of the house today, and off to summer camp/day care, I forgot half my Emmet costume. So I wasn't in costume today. I'll try to wear it tomorrow and Sunday (the other two days I'm going).