Micah,I'm just replying to your question about licensing your database.  I have struggled with the same issue, and in the end chose not to use any system to try to enforce licensing.  As a user, I get infuriated by companies which use licensing schemes which cause me problems when I try to use their product in a legitimate way.  For example, your user decides to take the database off the original computer and move it to another one.  Do they have to call you to get permission or assistance to do this?  I would not buy a product where I had to do that.  Even big companies with sophisticated licensing systems have upset me in the past to the point where I avoid their products.  So I think you should be very cautious about angering your users by implementing restrictive licensing methods.  My idea has been that whoever uses the database will probably need help at some point, and they won't be able to call for help if they haven't paid for it.