Imported calendars for Google Calendar

There are several calendars on my list: mine, separate for annual events (birthdays, etc.), 4 alien primary, 2 public:

- Russian Official Holidays 2008 (contains information on public holidays and working days)

- Weather in Moscow (One week ahead. By Weather Underground)
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It seems to me that I use far from all the possibilities of the Calendar. In this topic I propose to share calendars, ideas for them and all the rest that may concern the topic.

PS An interesting article on Habré: habrahabr.ru/blogs/events/21021 - a calendar of events runet.