If you looking to arrange an event that involves selling tickets (or even unpaid) Amiando offers a one-stop-shop for all of your online event management needs. They have several products which include a free (tester), a pay per ticket and a pay per person version to suit the size and type of event that you are holding. The free version is a little redundant with Facebook events, however is you are looking to create a nice website with URL, manage registration and analyze the attendance etc. then this seems to hit the mark. One to remember when your creating your next big event.