Looks interesting, but I don't want to sign up just to try it out. Have you considered a demo mode where you can fill an empty schedule, or edit a prefilled one, without being able to save changes? That's how I'd decide whether I was interested enough to give you my email address, generate a password, etc.
Exactly. Now I have to go through countless number of clicks (register, check email, click on the activation link, confirm activation, insert login details again) just to try the service.
Good idea. How about replacing the big screenshot slideshow on the landing page with a smaller, interactive agenda that is pre-filled with some items that you can edit / add to?