I stick by using the OT and the Thrawn trilogy as canon for our "NPT" as some have taken to calling it.

If I remember right, "Heir to the Empire" mentioned that attempted Jedi clones were highly mentally unstable (although I think it was really all "first generation" clones, I think it makes more sense for overall continuity if it's Jedi clones in general). I think that's perfect - why wouldn't the Emperor, or even the Mandalorians, try to clone Jedi that they could use to their benefit?

But if we stick by that, that means that Obi-Wan of the OT certainly can't be a clone.

That and I'm not fond of the idea in general.