[robbles]

This is interesting - I actually wrote a tool very similar to Grc a while back:

http://pypi.python.org/pypi/rad

It uses the same idea of config files specifying what regexes to look for and how to color them. This tools looks a little more full-featured and tested though.

Also, I only thought of applying it to highlighting log files. I didn't think of using aliases to improve the appearance of regular terminal commands.