What I said in the article was that just about every edition above Express *could* use it. But Microsoft chose to only put it in Enterprise Edition. For those of us who started using Standard Edition for 2-node HA clusters, this hurts. Standard Edition is economical and meets our needs. Enterprise Edition is pricey. But if we want to use the Audit object, we've got no choice but to use Enterprise.

As far as alternatives, there's nothing similar to it in the other versions.