Before committing resources to particular milestones & objectives for a fundraising campaign that employs groups, events, and applications on Facebook, OpenSocial, and other platforms, test (AB testing) the relative appeal of various assets (themes, messages, actors, stories, text, images, video, wikis, audio, speakers) and tools for your campaign on a representative sample of your target audience/engaged membership.

Some set of elements fit together and perform as a whole better than others. Find out which combinations create the best results.

Once testing is complete, estimate:

Quite a few non-profit organizations have set up a presence, primarily via groups, on Facebook. This is because the platform is very friendly to the development, deployment, and utilization of applications and integration that help an NPO to work more effectively on its'objectives.

Look at the early accomplishments on the Facebook platform by NTEN, "Non-Profits on Facebook", and TED to see a few good examples in their early going.