Online Social Action Platforms: A Complete List?

In the back of CauseWired, I’m planning to include some form of resources section and one of the things I’d like to do is public a decent list of online social action platforms, at least as of my deadline for changes. Here’s the list I have going so far (thanks to the always well-informed Peter Deitz for helping to round it out). Suggested additions most welcome!

allvoices

BetterPlace

BringLight

Care2

Causes on Facebook

Change.org

Changents

ChangingthePresent

ChipIn

Convio

DemocracyinAction

DonorsChoose

Firstgiving

freecycle

Fundable

GiveForward

GiveMeaning

Global Giving

Helpalot

JustGiving

justmeans

Karmadu

Kiva

Knowmore.org

Make The Difference Network

MicroGiving

Network for Good

PincGiving

PledgeBank

Razoo

SixDegrees

Social Actions

Social Markets

SocialVibe

TakingItGlobal

ThePoint

Zazengo