Facts cannot be copyrighted in the U.S. (source), so you can always post facts about an individual here. If the information you use comes from VirtualWall, you should provide a citation to it. Citation examples are provided on their site here: http://www.virtualwall.org/docs/copyright.htm
VirtualWall has posted copyright information on their site here and here. On the first link, they state, '"Fair Use" provisions of copyright law allow you to copy small excerpts of personal memorial pages without permission.' To use larger amounts of copyrighted material, they state:
Can I get permission to use The Virtual Wall's copyrighted material? MAYBE. Permission MAY be granted (or denied) depending on the intended use of the material. E-mail the Webmaster specifying exactly what material is requested, citing the source page(s) as well as the specific material, and what you want to do with it. If permission is granted, you will be required to include attribution to www.VirtualWall.org and a "Used with permission" caveat.