Flowing Fix: Web based services to help schedule meetings and resources

Doodle (web based)   http://doodle.com/:
Web based scheduling service that lets you ( and others) easily schedule appointments.  Integrates with existing digital calendars ( iCal, Outlook, Google, etc.) and allows users to select best times for meetings.

WhenIsGood (web based) http://whenisgood.net/ :
Another option for quick determining what meeting time is good for everyone.

YouCanBook.Me (web based) http://youcanbook.me/ :
Free version of the service allows you to link to one of your calendars (e.g., a Google Calendar) and allows users to schedule resources.  The service has numerous ways to customize the interface as well as auto-responses reminders to those that signed up and the host.  We use it to allow student to reserve survey equipment during the semester. It works wonderfully.

(all of the above site are Freemium based, i.e., the services are provided free of charge, but a premium is charged for the more advanced features)