The IMPA is the Internet Media Protective Association non-profit organization that is being formed by people in (and out?) of this industry in order to fight ACACIA's patent claims.
If you work with movies or audio on your sites, or TGP's or whatever,
Acacia wants a cut of your GROSS sales... irregardless of if you even turned a profit. If you took in any money, they want a cut.
A search of GFY for
ACACIA can help you understand what they are about.