If the application is assessed primarily on the founders, is it really worth failed applicants applying again? Speaking as someone who has applied (and failed, with cause!) twice relatively recently, and as an experienced 14 year 'veteran' of web technology, I can't say that my experience, skills or business-savvy have drastically changed since the application from 6 months ago.
As there's (understandably) no feedback for previous rejections (e.g. "Your idea sucks" vs "Your founders suck"), it's difficult to tell whether it's a waste of time to apply again. (Having said all that, we will of course be applying again anyway!)