I found a very interesting blog by the Facebook folks regarding some of their engineering challenges they've ran into here:  http://www.facebook.com/notes.php?id=9445547199

One of posts there is about a technology known as memcached.  They use memcached for a lot of thier database needs to scale out users, especially their new username feature.  A great read of the feature is here:  http://www.facebook.com/note.php?note_id=114979233919

So, that got me to thinking...how useful would memcached be for small to medium sized shops...those that are currently running some flavor of SQL Server or another RDBMS technology.  If you've got any experience with memcached or just have some opinions regarding the future of it in the RDBMS world, we'd love to hear it!!!

Tim