Here is the website mentioned before where the panels were purchased and there are a couple of panels listed now that I don't remember seeing before.
http://stores.ebay.com/Quilternatives
Here is also the Michael Miller website, they have all kinds of patterns listed for using these panels and they are all Free :D
http://www.michaelmillerfabrics.com/MMF/DownLoad.cfm?Gid=1147