schema shows through standard client connection but not through ODBC connection?
As I suspected this may have been, it actually appears to be an issue in Crystal Reports 2008 on the client side. 

Though I was unable to see the schema enumerated in the list of schemas, after selecting "Update" to link the two, I WAS able to select the various fields necessary and generate the report from the new datasource.

So, end result -- it doesn't show up, but it's there.