As far as I know there’s some good news and bad news…

Good news: the existing BizTalk SharePoint Adapter *should* work with SharePoint 2010 – you will however need to add ‘<rebinding>’ section to the existing adapters web.config *if* the SharePoint 2010 is installed locally to the BizTalk Server.

The ‘rebinding’ tells your local .NET app that even though you want V12.0.0.0 of the SharePoint APIs, V14.0.0.0 assemblies will give it to you.

Bad News: there’s no new BTS Adapter on the Horizon for this – AFAIK.

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With SharePoint 2010 we now have the capability to involve many tighter technologies such as:

1) event notification, rather than polling for the adapter.

2) LINQ and ADO.NET Entities to query the Data.

3) SharePoint Client WCF Service – Client.svc . This is a lightweight and fast interface, where we can batch up requests, send them over the wire and get back just what we ask for.

4) Lists.ASMX web service (+ the others) for backward compatibility.

When I get some time…:D, I’m keen to develop a .NET LOB WCF Adapter.