Hi Jonah, no can't think of any correspondence apart from the usual confirmation of payment. I ran Berlin last year and all the orgnisation was very straight forward, so nothing to worry about yet. I've also run London and New York as 3 of the 5 'Majors' but to be honest, these are self-appointed titles and I don't see much value in them.
I thought New York was a horrible course, very boring and hugely over hyped. Berlin was fabulous and frankly, London was even better. Maybe I am being setimental as a Brit living abroad (been in Belgium for nearly 12 years) but to be honest, I don't think so.
I got invited back to run NY this year but I didn't even bother to respond. Loved the city, really didn't enjoy anything about the race.