Anita O’Malley wrote about GaggleAMP in a great blog post about social media marketing.
In it she says discusses the power of amplification as one of the core strategies:
The power of amplification for all of your posts. One application that does this is GaggleAMP, which allows your organization’s employees, friends, business partners and fans to become part of a group that helps you push out your news, to all their networks. It’s like those few snowflakes that drop from the winter sky and become a full blown blizzard. Your messages will multiply.
See the full blog post here.