Some people are having problems logging in to the group.
If that's your case, please follow these steps:
Click "Sign in" on the top right when visiting the group (i.e. on
http://groups.google.com/a/chromium.org/group/chromium-html5/topics).
Click the following link on the lower left that says "Don't have a
Chromium
account? Enter your email address to access the document."
The box's text will change to "To sign in with a different account,
please
enter your email address:"
Enter the full gmail address, i.e. john.sm...@gmail.com
Then enter the gmail account's password.