I have heard the Vondenber/Fundenberg story before, but Your is the only confirmation. I have had contacts with another Fundenberg but it was long ago. I'll look for an old e-mail. In the meantime check out http://resources.rootsweb.com/cgi-bin/metasearchhttp://resources.rootsweb.com/cgi-bin/metasearch
Fundenburk and Funderburk are some names that are close, too.