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Site where caregivers can share their stories about being a caregiver and caring for their loved ones. Caregiving is very stressful - telling your story and connecting with others can be therapeutic and informative.
Privacy is certainly an issue. Not sure yet whether this site would be public or private. There are already many private sites out there targeted at patients for example. Once people are logged into the private site, they are more comfortable disclosing potentially sensitive info. (see http://crohnology.com - site for Crohn's patients)
My initial preference is to keep this site public. There are still lots of valuable and informative stories people can share, that do not require identifying the patient or even the caregiver.
Local discussion groups would be great. http://Crohnology.com does this as well. This site could be tied into local support groups to obtain members/contributors, and to provide that local presence.