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Almost every Perl 6 implementation implements their parser using Perl 6 regexes(partly because it's much more difficult to properly support the extensible grammar otherwise), which are essentially PEGs.

I don't know about implementations using PEGs, but I do know that the parser is possibly the least interesting thing about a virtual machine.

I don't disagree. Though, the post is about a new language that compiles down to an existing VMs instruction set :) That's not been done before in Coffeescript (as far as I know) but its also noteworthy because a PEG (which facilitates transforming syntax and semantics into a program using the VM instruction set) was used.

Javascript itself has also been compiled against a VM before. See: Rhino, IronJS.

CLR, JVM... what's the third?

JavaScript, I'd say.

Parrot (http://www.parrot.org/)