EventBrite

Ticket Seller used for lots of DotCom (and other) mini-events.

fees http://www.eventbrite.com/fees/ (free for free events)

creating discount codes http://www.eventbrite.com/t/howtocreatediscountcode

referral program (get 25% of net-to-EventBrite fees) http://www.eventbrite.com/t/eventbrite-referral-program

• list of public affiliates http://www.eventbrite.com/publicaffiliates

API

• http://www.programmableweb.com/api/eventbrite

• http://developer.eventbrite.com/