Kiko offers online calendering. They started some time ago, but where quickly followed by others, such as Google. As Google offers so many things under one account, and other competitors do the same (e.g. Yahoo), I think Kiko must have had a difficult time.

As a development team, we've decided we aren't able to support Kiko the way it and its users deserve to be supported, and have decided to find Kiko a new owner, by selling the site through an auction.(Source)

I think it sad, but sometimes inevitable.