>I'll try using the 2008 classes.
>I have to explain the extra development effort to managment, would it be correct to say that non ms databases are not natively supported or fully supported in MM 2010?

I think OakLeaf has done a good job at supporting most common databases that you want to use. I have requested some and they delivered in a reasonable time. The problem more is if nobody requests to use something, there is less likely to spend time creating or updating something. I would request it, but in the meantime take the 2008 class and open that project and rebuild it. Are you using Entity Framework?