hi Amanda,
you can add two tables from different data sources to crystal reports and link them in the Database Expert. simply create a new report and in your My Connections list you should see both of your report's connections. add the first one to your report. then add the second one.
now press the Next button and you'll have the linking expert where you can drag a join from the first table to the second table using the common fields between the two tables.
please note though that drawing data from two different data sources may have some performance issues when you are dealing with large record sets.
-jamie
