I think really any anime watching site. Try Animesquish.com
So You Think You Can Dance has not released any DVDs.
I have not found any episodes of Gilligan's Island anywhere but online...
Hulu has the episodes.
I do think that you could easily find a portable dance floor online. I would first try craigslist to see if there is something local, and you could even get a good price. I would also look up portable dance floors and see if any suggestions come up.
I dont think so.As far as I know the episodes were finished either 2008 or 2010
They dance in the April Fool's episode where Helga is pretending to be blind. I don't know if they dance in any other episodes though :)
The dance steps are "owned" by the dance school that choreographs them. Because of this, you will most likely not be able to find any written out online unless you belong to a school of Irish dance.
surfthechannel.com has a couple of episodes. You could also try hulu.com.
I think it might be on Just Dance 2014 according to Wikipedia
Its pretty unusual for a dance school to be on line as dance is a physical performance based art. I could only imagine that any courses would be for the theory aspect of dance. This can be accessed via any university that offers dance.
i think it is on johnny bravo episodes..