So, my question is: What's the story on ZFS and DTrace?

I realize I could answer my own question with a little searching, but the main reason I would consider an Oracle branded Linux distribution would be for a reasonably 'official' way of getting some of what made Open Solaris compelling. Whatever the story is, I think my curiosity is predictable and common enough to warrant a mention in your article.

I should note that I am completely uninformed, and only have a passing interest in these things. What little I know is second-hand and years out of date. Although I just did just do a 'sudo yum search zfs' on RHEL 6, which is the only search I should need.