Somebody has discovered that the official Google Calendar SMS notification number (48368) can also receive and answer messages. It understand "quick add" syntax so you can add events via SMS.
Despite of that it understand some other commands: "next" sends you your next event. "Day" sends your today's events and "nday" tomorrow's.

More: http://telegramsam.googlepages.com/googlecalendarsmstricks

this is kewl.. I also want (actually need) a method to create events on calendar..I must try this :)-

thanks for the pointer!