However, I cannot use gcalendar as it is now, as the site is slowed down while ggalendar is loading the calendars. This may not be a problem if you just are handling few google calendars. Thus, I use googles embeded calendar view as iframe. With this solution the site loads fast and the calendar shows up a while after. If gcalendar could do it the same way - I would be a happy man.
Anyway - thanks for a great extension!