Do a lot of non-profits use WordPress? Does yours? Are you looking for an integrated CRM solution because you are sick of maintaining a bunch of different data in different places?
Well.........
I am a community member for CiviCRM, which is a open-source CRM specifically designed for non-profits. Perhaps you have heard of CiviCRM? http://www.civicrm.org
We are currently contemplating integrating CiviCRM so that it will work as a WordPress plugin. Currently CiviCRM integrates only with Drupal and Joomla. WordPress' user base might have a lot of interest in CiviCRM, too. To integrate CiviCRM and WordPress, we need a few early adopters and a few contributions to get the project going.
Anyone who has interest in hearing more or joining us in our efforts, please visit http://www.civicrm.org - I am "Stoob" there as well