Two obvious points where leaving it unencrypted is a problem: 1. downloads - which is mostly mitigated by not actually having software downloads on their own site, although of course now the
links are subvertable, and 2. they have a paypal donation form on
http://www.aros.org/download.php - I
assume that clicking into that sends you to the real paypal page, so at least they're not sending credit card details in the clear, but again leaves them open to a nice little tweak to change where the money goes.