For those of us that have been (patiently) following the progress of the CB Subscriptions plugin, the CB Team would like to inform you that the plugin is currently in alpha testing and we are gearing up for the first beta test phase.
We have created a special forum area about this plugin and have already announced a beta testing phase and are requesting experienced users to assist us in this effort. For more information please read the forum post here.
The CB subscriptions plugin is a paid membership management system built around CB and Joomla/Mambo. It currently supports Paypal, Authorize.Net and Yellowpay and has a ton of features!