Commerce equivalent of Signup, Pay Per Node, etc
Here are a few links that might get you started.  Drupal commerce is a lot more powerful than Ubercart, because everything is fieldable you should be able to make your event signup product include any fields you wish to collect.  I'm not sure what you mean by print-on-demand fundraiser but hopefully this gets you heading in the right direction.

http://vimeo.com/31459435

http://mustardseedmedia.com/podcast/episode51

~Mark