I've been asked to look at implementing SSO from an iPad to a SharePoint 2007 installation.
This could use ISA Server 2006 or any other product.
Is this possible? If so how?
I was thinking installing client certificates on an iPad, using them on the ISA Server, and then passing the credentials of that user through to SharePoint?
You should look into Microsoft Forefront UAG. The 2007 version works with my iPhone and the 2010 version is supposedly more "Mac Friendly".