Calendar ante upped.My friend Ernie helped out on the new Yahoo! Calendar interface (requires login) which is such a vast improvement on the old interface that it takes my breath away to think of the effort required and changes accepted within the Yahoo! body politic.
But I've met several members of that team (I interviewed there not so long ago) and know to expect good things. I like watching the success of competitors...it keeps raising the bar. (Also, I get to switch back to using the thing.)