Legal contacts:
Stoll, Glickman, & Bellina, who handled Matthew’s first wrongful arrest suit
Galluzzo & Johnson, who have expressed interest in taking on future wrongful arrest cases
Paul Hale of Hale Legal Group, who’s expressed interest in both wrongful arrest and summons cases.
Performers’ rights:
Susie Tanenbaum’s “Know Your Rights” guide for subway performers, hosted by City Lore
Attorney Matthew Galluzzo’s analysis of the MTA rules and the possibility of false arrest lawsuits
The NYPD’s own well-written breakdown of MTA performance rules. We wish they would follow this clear and simple language!
Books, articles, and blogs:
Underground Harmonies: Susie Tanenbaum’s opus on NYC subway performance
Steven G. Baird’s website with a wealth of information on subway performances
Busking and performance-related organizations
Music Under New York: the MTA-sponsored performance program
The Civilian Complaint Review Board, which receives and investigates complaints about police conduct
The NYPD’s list of precincts, including addresses and contact information for their commanding officers. Transit districts, the most relevant, are listed at the bottom.
Please, do submit any and all additional resources that you’re aware of! This list can only expand from here.
buskny.com 
Enjoyed your blog! Next time I come to NYC and get arrested for busking, I will look you up. Your busking pal from Oklahoma,
Honkytonk Stepchild
Great, I’m glad you like it! When you’re in NYC, let me know, and I can tell you where I’m playing. (Maybe we can share a set, or even go to jail together!)
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Hey, thanks Matthew for your work on this topic and providing valuable info. I’m going to start busking more regularly and want to see what I’m in for.
Thanks, glad to hear it’s helpful! I dropped you an email at the address you listed so we’re in touch. If you don’t see it, drop a line to our address when you can!
You are so special to have taken on this role. I support you and all your efforts. I also would like to purchase a T-Shirt. Let me know how I can help.