I just complete a new, DIY equipment rack: see pics below.

My requirement was for a compact, single-column rack that could accommodate all components; also, make it as easy as possible to swap equipment and reconnect cables. Aesthetics weren't a big concern but I preferred that it be reasonably presentable. In addition, the rack had to cheap.

I wanted a couple of specific features that aren't necessarily easy to find.
  1. Adjustable shelf which I figured I needed to hold all equipment in a compact format, and
  2. Wheels so the rack could be move in aid of easy recabling.
I think all requirements are met. The finish isn't furniture grade but reasonable -- I'm very likely to repaint to a color other than yellow.