In case anyone's interested, I wrote up a desktop icon for pymazon.

Assuming you installed python-crypto with apt-get, then downloaded the pymazon code from the first post and ran "python setup.py install" as root in the uncompressed Pymazon folder, then do the following to have Pymazon in your apps menu:

As root, copy the following file to
/usr/share/applications/hildon

http://www.besh.com/~chad/pymazon.desktop

And as root, copy the following file to
/usr/share/icons/hicolor/48x48/apps

http://www.besh.com/~chad/amazonmp3.png

You may need to reboot your N900 to have the app icons display correctly.