There is a book of condolences at the British Monarchy website. There has been a great deal of traffic, but you may
be able to get in now.
The Governor-General of Canada also has a condolence book,
and you should have less trouble in accessing this one.
In addition to expressing sympathy, please include a message of support
for the Royal Family and monarchy.
If you hear a criticism or comment about the Royal Family on any of the
TV networks or radio which you think is unfair or inaccurate, please do
something about it. Telephone them. E-mail them. Write them. Fax
them. This is becoming a time when it is crucial to show support for
the monarchy. [RD]