Bev Butula's recent column in InsideTrack introduces a couple of tools for scheduling meetings:

Coordinating schedules when working with a group of individuals can be a time-consuming process. It often entails several email exchanges or numerous telephone calls. Many experience the problem arranging times to meet with co-counsel, committee members or social groups. There are several online programs designed to help facilitate the process. This article discusses two of them [Doodle and Meeting Wizard].