Yes. There is, to my knowledge, no popular language people haven't finished in.

We'll have solutions in most of the languages on a public website in a couple weeks. :)

The challenges were published, right? Where are they? Googling for "Matasano Crypto Challenges" shows a bunch of old links.

Nope, the challenges have never been published. We've asked everyone who's done them not to share them.

slightly off topic but, like your appsec reading list above, are there any crypto resources you value for someone taking the self learning route into real world crypto?