John Gruber writes in his (to be expected) excellent review of the Dashboard/Konfabulator situation:
I can’t think of any possible way that gadget development could be based on something that would enable more Mac nerds to get up and running writing their own gadgets.
Oh boy, there goes the barrier to entry. Every HTML/CSS/JS hacker wanna-be suddenly becomes an OS X gadget developer. Get ready VersionTracker.