There are lots of sites out there set up to find links and that create communities of people with message boards, chat and other features. Here are links to some of the best.
http://www.eons.com - A web portal for people over 50. Includes a longevity calculator, expert advice on how to live a nice lifestyle when you're over 50, brain builder games, travel information and other fun ideas.
http://www.seniorssearch.com/ - A web portal designed specifically for seniors. Includes a thriving message board community.
http://www.slmseniors.com/ - SLM Seniors strives to be a one-stop shop for information for seniors. It succeeds best in the health arena, with its “ MediFocus Guides” on many topics.
http://www.grandmabetty.com/ - If there’s a website with a “homespun” feel, this is it. Grandma Betty personally has selected over 1,000 sites just for seniors.