FWIW, the .5RU panels do exist: http://proaudiostash.com/product/19-inch-racking/rack-panels/vented/05u-vented-rack-panel/11783.shtmlThe picture there sure looks like a perspective-shortened angle on a 1U panel (as the .5U ones only have one hole on each side), but I bought a few of the .5U ones from these guys, and they're fine. They're made by Penn Fabrication.
yeah, but heat rises, and that funk logic panel doesn't really look like it's venting anything. i'd also put the real 1u vent above the manley.