LinkedIn is a business/social networking site that is free to join.
I have been a member for 5 years or so, with no bad experiences.
The site is at:
www.linkedin.com
The LinkedIn social network has an ITIL foundations group.
This appears to be a good spot to ask questions as the group seems to be well qualified and responsive.
The link to the group is here:
http://www.linkedin.com/groups?gid=57960&trk=hb_side_g
