Isn't that cat Brian a funny guy. A much better mod than that A-hole Sanchin31, that he replaced!
I have done seminars, but not really in the way that you think. My normal M.O is to find a nice friendly dojo(any style) in an area that I am working in. I like to learn what they know. Share ideas. See different ways of doing things.
In return for their kindness of teaching me new concepts, principles, techniques, etc. I offer to show others something that may be valuable to them(with permision from the Sensei,Sifu,etc.)
I don't often get to the NY area. Rest assured that when I do, I'll let everyone know.
There are some guys here that I am dying to meet and learn from, that live in the greater NE region of the US. Kintama,MattJ,JohnL, Gino all spring to mind.