I have the Orcas 1 beta, and have installed it -- but I haven't had time to incorporate any of the changes into a provider yet. There've been a LOT of changes and most of them undocumented. It also looks like 3rd party provider support won't officially make it into the Orcas release ... I guess that remains to be seen.
When I have some time I'll be going over it. There's some xml manifests I need to include, and a bunch of other things. Looks like they've also added support for insert/update/delete into the query pipeline that needs coding as well.
Robert