progress on generic sellpage - is not yet linked from existing connect buttons and editing has not been completed
premium/restricted channel connections implemented, configure at yoursite/channel/nickname - this basically redirects "follow" requests to a premium channel's sell page if it has one configured. You can still click through and create a connection request (introduction), but this provides a means for the channel owner to state their terms. If you don't abide by the terms, you will likely be blocked or the channel deleted. This facility is extensible in a number of ways.