Your comments

Clojure is missing, so I checked "Lisp" (though there is really no such thing)
I think the problem is that when you scale the icon down, the key metaphor gets lost. I also thought it didn't look too well and I never realized it was supposed to represent a key until I saw the 512x512 version.
Yes, I will definitely be waiting for that.
Oh, cool, that's even better. And, having just tested it, works just fine for now. Thanks!
Ok, cool — I guess this means I can buy Textastic now, rename all my files to .lisp and live with it as an interim solution. Thanks! I'll be awaiting the update.
So, has this been implemented? I would buy Textastic in a snap if I could be sure it will at least open (and better, highlight) my Clojure code.