A new field has been added to the Sales Report Generator 187: Main Source Name which you can search on. It can also be used on the Sort and Display options of the report, which is useful to group all sales done by Telephone etc.
Also for the Sort / Design options there is an option for 188: Second Source Name, which will show Shop, Telephone or Internet if a Second-Source has been selected in the sales header.
Any Questions on this, or if you have any other suggestions for a 'Carl Tip' that other people would find useful, drop me a line on support.