What is the Best Calendar?

An anonymous reader writes "In the flurry of AJAX applications being put to market, Google's new calendar has been getting quite a bit of attention. But being drowned out in this media blitz is Kiko, a startup from Paul Graham's Y Combinator program, along with spongecell, Trumba, Yahoo! calendar, and 30boxes. Which do you prefer?" Update: 04/16 14:55 GMT by Z : YCombinator link fixed.