The shorter link (without the "index.html" on the end) works on a GenForum posting, but not in the Browser Address, resulting in the "404 Page Not Avaiable" message from Genealogy.com. I think that was my problem.
I also tried the longer link from an MS Office Word 2007 file and an MS Outlook 2007 email message, and it worked promptly from both locations.
My operating system MS Vista doesn't seem to have a "Copy Address Link" function (with the right click on the mouse), but "create shortcut" copied the link for me.
Use of these links will help me to better utilize the Genealogy.com site.