Sorry to resurrect an old thread, but I thought this would be worth mentioning.
An additional thing to keep in mind is to plan on smaller flights for the high alcohol or palate-fatiguing categories. Stouts, Strong Ales, IPAs, Belgian Strong Ales, Bock, Spice/Herb/Veg, and Specialty should be split to around 8 per flight. Lighter styles are ok to go with bigger flights.
Above about 12 is when guys get tired and slow.