It looks very much like Pascal to me.
Python's influence is obvious: iterators, whitespace, and default values for arguments. Pascal's main influence seems to be type declarations and the way things are named. C-esque enumerations, strings ending in null and pointers.
It does have lists/sequences, sets and tuples, but associative arrays/dictionaries seem like a major oversight.
Seems like {perl|ruby|etc}-light.
I don't get it. The scripting languaguages in common use are quite similar; what distinguishes Nimrod?
Perl 5 has had source filters for a long time. It isn't unique, afaik.
Still neat, I guess.
Did you not bother to read it?
But if it is really fast, then I'd say it is like some spicy indian chicken and consider using it -- if there also is an interpreted version.