instead of:

12.12.12.12
24.24.24.24
26.26.26.26

it'd be nice if i could see

nc.us.ibm.com
2236.pc.poop.tt
evil.blah.comcast.rockville.md.com

in other words, the resolved cannonical names.

i can resolve each IP address, one at a time, but this is tedious, obviously. is there a program out there that will look at your server logs, and resolve every IP address therein?

There's nothing That I know of that does that.
You probably could write a shell script that could take care of it pretty easily... I'm not to great with shell scripting, otherwise I'd give you some code.

Apache has an option to automaticly do it for you when it creates the logs, but it slows things down quite a bit.