[Koha] Koha in Manhattan

Due to the volcanic eruption in Iceland, I find myself unexpectedly detained in Manhattan. I was planning to attend a Koha open day in London on Friday, but won't be able to get there. I was wondering if there was a Koha installation here in New York with a friendly who would be willing to spend some time showing me how their library uses it, and talk to me about how they went about implementing the changeover. While I am sure Koha is the right solution for us, I'm a bit daunted by the transitional process. . . -- Elaine