So... yeah.

I started a petition (http://www.change.org/petitions/give-us-our-ponies) to try to encourage the parties in charge to release a full season set of MLP:FiM on physical home media (for Region 1).
B Ward, an employee of Shout Factory, explained the process here: http://www.equestriadaily.com/2011/.....n-mlp-dvd.html
According to him, they need a guaranteed # of DVD/Blu-Ray sets being bought by consumers. He mentioned that they need roughly a guaranteed 50k sales. To prove this can be successful, they have already announced a release for Region 4 from Madmen, titled "The Brony Box."

Sadly, I haven't been able to spread the word about my petition much. So, if you like ponies and want to own a season set, PLEASE spread the word. A brohoof to all that sign/spread!