O Steve Peschka escreveu 3 artigos relativos à implentação de FBA em sites de Sharepoint

Forms Authentication in SharePoint Products and Technologies (Part 1): Introduction (http://msdn2.microsoft.com/en-us/library/bb975136.aspx)

Forms Authentication in SharePoint Products and Technologies (Part 2): Membership and Role Provider Samples (http://msdn2.microsoft.com/en-us/library/bb975135.aspx)

Forms Authentication in SharePoint Products and Technologies (Part 3): Forms Authentication vs. Windows Authentication (http://msdn2.microsoft.com/en-us/library/bb977430.aspx)