How about this idea?
Memo: Marcello, I'll give you $20 to put this piece of crap in the showcase.
RE: Hmmm... It's gonna take at least $40 for that piece of crap.
Memo: $40? Damn... OK. Paypal?
RE: Paypal will be fine. I'll have it in the showcase tomorrow.
Memo: Cool! Thanks, man.
I like Staci's idea, something more like Daily Deviations would be cool. The whole 'like and dislike button system' seems like it would be counterproductive because it allows people to judge anonymously and without explanation, making the showcase purely a popularity contest (opposed to a place to display the sites more skillful or innovative or interesting digital art). And yes, judging things like this would be subjective but could be relatively objective if there was some loose criteria to be met that we all agreed on (I mean, don't most prominent and respected award systems work in such a way?).
Thinking about it now I think there are pretty solid reasons a lot of pieces were showcases like this one. There was a collective evolution of skill as 2draw developed from when I joined in 2004. There seemed to be a point where the bar was raised weekly for a few years and then we got to now where it has kind of gone stagnant. We are left to look at the current content as a whole and maybe a lot doesn't fit, but when it was showcased it was amazing, inspiring, or whatever at the time it as created.
Memo: Marcello, I'll give you $20 to put this piece of crap in the showcase.
RE: Hmmm... It's gonna take at least $40 for that piece of crap.
Memo: $40? Damn... OK. Paypal?
RE: Paypal will be fine. I'll have it in the showcase tomorrow.
Memo: Cool! Thanks, man.