Doodle.com is a free and easy-to-use online resource for scheduling meetings. It is especially great when trying to coordinate amongst several people at once. I recently suggested it to a co-worker who was trying to set up a meeting between several people who did not work in the same company (they had all collaborated on a project together). It worked really well! Again the tool is free and terribly easy to use. It is a lot less labor intensive to use Doodle than to send out a group email to schedule an event or meeting. Check it out!