I've had good results using Rootsweb message boards. You post a message asking for help, and other genealogy buffs help out. Try here:
http://www.orgenweb.org/marion/marlist.htm

and local genweb sites, which often have local resources not found on bigger sites:
http://orgenweb.org/marion/

Just today, I got information on a grandfather--who I've been unable to find for years, from a posting I made on findagrave.com.

Who knows--you might have relatives yet undiscovered.

Good luck, and do let me know if either resource helps.