Microsoft .NET 2.0 introduces new features around the 'provider' model, and ships with Membership, Role, and Profile providers that simplify management of user account information. This project ports these 3 providers to support Postgres.
The .NET 2.0 Member, Role, Profile Providersproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/net-2-providers, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.