I guess the main thing most of us can contribute is what features we think would be important. I mean I can code PHP5 but I'm rusty and can't guarantee my code isn't full of flaws. I can write SQL but the most complex I get is using a few group bys and joins. So in the end, if you want it done right, have Rob do it.
Anyway, as a feature, it might not be bad to have the option to post links to games that we host instead of putting the hosting on 1km1kt. Give the links the same sorting and meta tags as the actual files so they're mostly the same. If the sql is storing a link, then why not make the option of having it point off site.
Along with that thought, it would be handy to have a dead link flag that a user could flag and a mod could confirm and then list the link as dead. I don't know if you want to completely kill the meta data or just have it labeled as a dead link in the search. That way the user could know the game existed at one point but has disappeared. They could then ask around if anyone still has a copy.
As a third option, 2km2kt could have a link that points off site, but then if the link is DOA a stored version of the game would then become active and locally hosted if the original poster uploaded one.
Those are just my initial thoughts on that.