I am an avid fan of CCleaner, Defraggler and Recuva. To me, the obvious next step for Piriform is to develop a data backup program. Something that can burn directly to CD or DVD and can burn across multiple disks. Archiving and encryption would be nice bonuses as well.
I recently did some searching for a free backup program for Windows -- funny thing is, there's really not many out there. And even if there were, I'm sure Piriform could do it better.
Anyway, it just seems like a logical fit in Piriform's already excellent portfolio.
