Liam Cleary (VSTO/SharePoint/Office/Vista) guru guy has posted a KILLER ENTRY on how to:

"Write your own Custom Authentication Provider C#" for MOSS 2007.

Check it out here.

COMMUNITY CHALLENGE: Someone write a Membership/role/Custom Authentication provide for MOSS 2007 which backs onto custom attributes in Microsoft CRM - send me the code (or a link) and I'll make you famous (or try to).