[pinchyfingers]

I would turn to the Racket community first to learn about creating programming languages, they kind of have a thing for it.

Here's a start:

http://queue.acm.org/detail.cfm?id=2068896

[takikawa]

I would also look at PLAI (Programming Languages: Application and Interpretation): http://cs.brown.edu/~sk/Publications/Books/ProgLangs/2007-04...

It's an excellent free undergraduate-level PL textbook that covers a lot of ground and is informed by both research and practice. There's a 2nd edition linked from there as well.