R2 EDI Samples

Hi,

I'm pretty new to working with EDI sand BT 06 for that matter and we
currently use it in a Biztalk 2002 solution. I've since upgraded to
the beta 2006 R2 and have worked though an architecture for our flat
file and XML partners.  Now I need to look at our EDI partners,
specifically 3 versions of X12 that we use heavily.  The sample that
comes with R2 doesn't have any sort of readme or explanation as to
what it does or how to set it up for the newbie.

Can anyone recommend a tutorial or sample applications that illustrate
how to use all this new EDI functionality in R2?

Thanks in advance