On Mon, 3 Feb 2003 13:46:09 -0700, "Jon Noring"
wrote:
~
~Are there any recent inventions in this area that may be what we
~are looking for, such as interlocking blocks (akin to legos) by
~which we can build the raised beds retainer?

Here's another firm offering interlocking blocks which might serve
your purpose.

http://www.unilock.com/walls/stackstone/index.html