Connolly's foundation still does massive charity work in the Dallas area. For years her foundation sponsored the Women's tour event in Dallas. Her's the link to her foundation:
This is a great site. It even has brief film footage of Mo, her coach "Teach"(who also took Marble to the top) and Connolly's Wimbledon wins of 1953 and 1954
There was also a TV movie about her (the mother from the "Waltons" plays "Teach")
Finally, I can really recommend her daughter's book, which deals with Mo's later years after tennis and offers insight into what made her such a special person.