We have started a new list to talk about extensions to CiviCRM to handle the constituent, donor and membership management aspects of open source foundations. You can sign up for the list here. One of the main goals of this project is to enable integration with LedgerSMB, an open source accounting package. An indirect benefit would be a port of CiviCRM to PostgreSQL. Please sign up for the mailing list if you are in need of a solution for a foundation or have expertise in the area.