Dec 14 - Event Management

I've been on the receiving end of Doodle (for setting up times for teleconferences), Google Calendar (not so much though as it requires me to use Google Calendar as my regular diary and I tend to use my Outlook calendar instead, perhaps if I was doing a lot more stuff from home I may use it differently), and Eventbrite (eg, the next Readers Advisory seminar, Murder in the Metcalfe, is using Eventbrite to 'sell' tickets).
I like Doodle and Eventbrite as they tend to suit the relevant purpose. Doodle is quick and easy to use (both in setting up and replying to) and you can easily see what dates/times other attendees have selected; the same can be said for Eventbrite, though it has the advantage of also being able to provide agenda details etc.. That, and Eventbrite allows for better event planning based on the number of tickets 'sold'. You know from the outset how many seats are available and can quickly determine if an event needs to be promoted a bit more or if you need to remind people that tickets are going fast so be quick! The fact that respondents can log back in to their booking and make changes is great as is the planning usefulness of obtaining respondents' email addresses.
Within our team here at HQ we make good use of our HQ Outlook calendar to schedule meetings, events, etc. The advantage here is that once I set up an event in the HQ Outlook calendar I can invite myself or various others who also share this calendar to an event/meeting and the info automatically dumps in to my/their calendar - pretty much the same principle as Google Calendar.
(I still live with my desk diary open beside me every day and rarely go to meetings without it, but then again, I'm also a chronic note-taker)