We are making some updates to our server to coincide with the PayPal security update requirements which may have the site become unavailable for short 5-10 period over a few hours in the afternoon. These updates are necessary to keep the site running after PayPal updates their security settings.
UPDATE: As of 4:05PM EST, we are finished configuring the server. Depending on how PayPal's update goes on their end, we may have more maintenance to do in the next few days, but we are looking good at this moment.