There is an article that the LK launch in London,UK at one of their HMV stores that they beat BC's record of 1,500 people in line. It was beat by LK when there was 2,500 gamers-- some waiting in line for 36 hours to get a copy of LK for their midnight sale
I can't imagine a line like that.
Article :
http://www.pcretailmag.com/news/30774/Record-turnout-for-World-of-Warcraft-launchAnd it looks like the Anaheim "Electronic Fry's" stores that were selling the expansion were pretty line heavy too. The first person in one of the lines waited 39 hours to be first in line. People were able to get their copies signed by artists and from what the article suggests, they were just wrapping everything up about 5:40am PST. I guess there were 120 artists available to sign copies and other LK things. I didn't see any totals of the amount of people waiting in that line.
Article:
http://www.tgdaily.com/content/view/40175/98/