An even smarter criminal would have "mined" the Ripple give away using EC2, there are still people paying for those instances as we speak so surely they would be more profitable than litecoin mining (assuming you sell them right away).
I'll boinc on my desktop for science and goodwill but will not waste any more time on Ripple's program or indeed on Ripple itself, as brilliant as the idea is. Ripple's founders are hanging on to their 60%+ outstanding Ripples so tightly that I suspect the project will never truly get off the ground.
As much as people criticize it, I think some variation of Bitcoin's seignorage mining is the only realistic way to bootstrap a successful virtual currency, at least at this point.