Hello Tom.
Have you had a chance to look at Google's License Verification Library (LVL)? If not, I would recommend that you do so, as it provides much of the functionality of AAL (almost seems like they copied the idea :) but with certain distinct advantages such as integration with the market application (which subsequently requires fewer scary permissions from your app), better encryption, etc.
If you're still interested in using AAL (I use it in my apps still), just let me know. In the mean time, I'm going to refund your support donation.
Hope that helps!
Dave Keyes