I thought this might interest some of the gang here...
A member over on my tool and fabrication forum
(Mxtras) has created a great alternative to the high cost of toolboxes for the do-it-yourselfer. The units he created not only look good and sturdy, but don't seem to be all that hard to build.
He provided drawings, so with pulling info and pics from a few threads going on the subject, I put together a writeup - complete with page for downloading the drawings in various formats.
The writeup can be found here.