Rascal MPL is another one that comes to mind.

http://www.rascal-mpl.org/

It looks like Pyret was first written in Racket. I think it's optionally typed, though.

https://github.com/brownplt/pyret-lang-resugarer

I think Pogoscript, Argile and Zinc allow spaces.

http://pogoscript.org/guide/variables.html http://www.nongnu.org/argile/ http://tibleiz.net/zinc/identifiers.html

Was it Wake?

http://wakelang.com/

Ah, yes it was thank you!

I second (or third) Warren Ellis's stuff. Orbiter and Ministry of Space are a couple of good sci-fi books. Planetary's also pretty awesome, but it's more superhero-y.

Others off the top of my head:

Wizzywig by Ed Piskor - fictional account of a Kevin Mitnick-type hacker.

We3 by Grant Morrison and Frank Quitely - 3 bionically enhanced animals escape their captors and talk funny.

Lazarus by Greg Rucka and Michael Lark - an immortal hitwoman with a conscience in a feudal society.

RASL by Jeff Smith - art thief is chased through parallel universes.

Casanova by Matt Fraction, Fabio Moon and Gabriel Ba - more parallel universe hijinks, this time with spies.