Just in from Inside Google blog Google Calendar Expected Tomorrow Read whole story there.
"Rumor is that Google will unveil the long-ago rumored Google Calendar at Tuesday’s When 2.0 conference at Stanford. Will Google Calendar use some company’s calendar format, a brand-new incompatible format , offer converters from but not to other formats , or will Google do the smart and diplomatic thing? Will Google Calendar steal some of Microsoft’s thunder and support RSS SSE?"
via Inside Google and Findory