Care to tell what are the popular bands that have done well without "recording industry"?

I'm sure we have heard of them.

You should watch this videocast "ZFS in FreeBSD". It gives much detail about the current state of the port. Pawel Jakub Dawidek is the guy behind it, he and others have done an excellent job. Besides, he offers some good-to-know tips, i.e., under what work-loads it's better to run it on 64bit hardware etc. In general, Pawel's saying that it has been 'production ready' (meaning, performance will be further improved but from now you can easily trust it to take care of your data) for a while. I'd even suggest using the 8-CURRENT snapshots. To quote from their wiki: "A new revision of ZFS for FreeBSD is available for FreeBSD 8-CURRENT, introducing many new features (ZFS version 13). It fixes some of the problems but requires the same kind of tuning as the older revision (ZFS version 6)."