Here is the link to sign up for the salesforce user group.
It is free, last Tuesday of the month.
We have a wide variety of users...(currently about 40) who are using salesforce. We
are seeking folks willing to share things they are doing or challenges you are having.
One experiment we are doing as a user group is using "chatter" so that users can learn if this resource would be helpful in their work environment.
Salesforce Faciliator (volunteer) for Hawaii