To use the Owner's Forum, you need to own an IS300. With your IS300, you should have received the "2001 Lexus Owner's Manual Supplement". On page 70 of this booklet, under the heading "High Speed", the second word in the paragraph is the forum password. You must enter this password every time you wish to start a topic or reply to an existing topic
For Canadian owners, you should look on page 45 (right hand column) for the paragraph heading "High Speed". I'm not sure if the content is the same as the American Owner's Manual Supplement but the password is there.
Enjoy the site. Great to see that there are some Canadians around here. I've been IS spotting for the last little while but there aren't a lot of them around here. Guess people realized that snow and RWD do not mix well.