Very impressive - a filesystem that detects and corrects data corruption and runs on ordinary hardware! Add to the fact that - when used with OpenSolaris - the pricetag is “free”.
Hitting the meme of offering the best possible deal AND the best possible technology to the customer (rather than trying to extract every last dollar) is a good way of generating loyal customers. Customers who will put you first in line when they need to do large scale deployments (and want to buy support, hardware, etc.).