I've just added the ability to donate to the site using the Amazon.com honor system for donations.
If you choose to donate using Amazon.com, you'll have to email us yourself with your Amazon.com "Order Summary ID#", in order for us to activate your membership, since Amazon.com donations are anonymous and we have no other way of knowing who the donation has come from; Amazon.com also takes a larger portion of your donation from us as a surcharge for using their service (and requires you to create an amazon.com account before you can donate), so we'd recommend and prefer that you used PayPal.com.
I have to I much prefer dealing with PayPal, but at least here is another option for people who have an issue with PayPal, or who want to remain anonymous for some reason.