Count of Reports by DataSource

[bsod55]

Is there a way of determing the # of reports by datasource? I need to get a
result set similar to the following:

DataSourceName, DataSourcePath, # of Reports

I have tried using the Catalog and DataSource tables. I know this shoudl be
simple, but for some reason I am going around in circles. I jsut keep going
in circles in the DataSource table. Using Type field in the Catalog table I
can get the Path and Names for reports and datasources. I just can't seem to
find a way to join the two resultsets together by path and datasource name.

Thanks in advance for your help.