You might as well go read the post here at the OpenX site. I thought a few readers might want to bookmark this. The solution is simple. To use OpenX on debian (etch), simply downgrade the PHP version to 4. Sucks but hell, it works.
Sidenote, I am still having issues with referring to it as “OpenX” as opposed to “Openads”. Heck, I only just got used to “Openads” over “phpAdsNew”!