Check out 30 Boxes. It is a really cool social online calendar that allows you to share with friends and connect to your blogs and flickr. It is in beta and free to sign up. Let me know what you think.
"Welcome. 30 Boxes was created for people looking for a robust yet simple social calendar that is easy to share with family and friends. You can:
- make a calendar
- add family and friends as Buddies
- share all or parts of your calendar with Buddies
- follow your Buddies' web stuff (like flickr, myspace, webshots, livejournal, heck, any personal blog)
- customize your calendar's look and feel
- publish some or all of your calendar (put it on your blog)