Chris,
There is a wonderful program called ArtworksPro that I use to track commission/clients and much more, If you go to their website at
www.artworkspro.com you can view a 4 minute demo .
Some of my favorite things:
You can enter images and do a slide show of your work and by using the filters you can select what you want to see. Great for prospective clients.
The filters have a lot of different uses such as printing reports.
The service they provide is also great. I had a technical question about 7 months after purchasing. I emailed them and I recieved a reply the same day and they were very helpful. I believe they are located in Australia.
It is SIMPLE to use and the price is reasonable!!!!
I had the trial version of Working Artist and hated it. It was difficult and confusing and did not seem to meet my needs.
I am also just getting set up to use Quicken. That is the program my accountant asked me to buy so I can keep track of things for my taxes. I just bought Quicken premier home and business 2005 for $14.99 on ebay. I also teach in my studio (regular weekly classes) and sell supplies so my paperwork is usually in total chaos. (I can relate Michele

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I hope ArtworksPro is what you are looking for !