I certainly do recommend it. I am using it since 3 months in production, and for my purposes (mainly using Moose for various analyses), it works perfectly.
But, even if you would get problems, leaving on the very edge is more productive (but more counter-intuitive) when the community is smaller. Just look at Pharo 2.0. It takes longer to get fixes integrated, and if you depend on them, your life will be harder. On the latest Pharo, you might get some problems at first, but I suspect you can find those problems quite fast and the reaction you would get will more than payoff.
And yet another reason is this: if you have serious interests in Pharo, you will sooner or later end up wanting to influence one part or another (for example, extend Collection with flatCollect: :)). In this case, working on the latest version puts you in a better position to influence Pharo in the direction you want it to go.
As I said, it is less obvious, but I think in our community, it makes much better sense to live closer to the edge.
Cheers,
Doru