Plancast is a service for sharing your upcoming plans with friends. Using Plancast you can easily arrange an event, meeting or gathering at a specific location and then share the information with friends.
Plancast uses Google Maps to show the location of your plans. In fact the site has a great auto-suggest tool that loads a thumbnail Google Map of your location as you type the address.
You can create a plan or event on Plancast by signing in with your Twitter or Facebook account. Plancast even automatically imports your Facebook events. Once you have created an event you can then easily share the information by getting Plancast to automatically post the details to your Twitter and/or Facebook accounts.