In my internet wanderings I came across a veritable gold mine of information at the Family Caregiver Alliance that has general information and also lets you search by state to find resources in your area. I followed that path and found CAPS, (Children with Aging Parents) a national organization and online support group for people involved in the care of their aging parents. Another great link from this site is to yet another helpful site Aging Parents and Elder Care.
Caregiving can be an overwhelming task in itself no matter the particulars but caring for your parents is a leap to a whole 'nother level. A lifetime relationship brings its own communication and ingrained idiosyncrasies that are driven by a lifetime of family dynamics. When we can come together, even on a relatively anonymous level such as an online support group, we are strengthened by the support and encouragement from folks who are walking in the same moccasins as we are.