The first version is available for public release. I submitted a dumbed down version of this for the contest, but I've put the finishing touches on this for now and am making it available to the masses.
OPI requires PHP 4.1 or greater with PEAR DB. PEAR is a DB independent API which allows OPI to be used with DBs beyond just MySQL. Although, I have currently only tested it with MySQL.
The readme file in the download contains installation and use directions.
Download Here
Feel free to post comments, suggestions, questions here.