The VRT on Exchange 2010 Upgrade went very well. There was interesting conversation throughout the presentation. I thought the discussion regarding archiving and journaling as it relates to Exchange was very informative. The best diagrams that explain the concept of journaling and archiving are included in this GFI document. Evault was another product discussed as well which is made by Symatec.
The products discussed in the presentation on this topic were GFI Archiver and Journalling and Evault in particular. You can download the GFI Archiver information attached here.