Level designers

I've been thinking of looking for someone to team up with to do some levels for a game I'm making. Basically, the engine is done, but I'd rather work on dialogue and scripting than laying out rooms. I don't mind doing some rooms, but there's a lot to be done.

Anyway, do any of you have any experiences that you wouldn't mind sharing about farming out level design like this? Also, do you know of any particular forums that are good for finding people interested in this kind of work?

There's plenty of hard-up Indie Devs on IndieGamer. I'm sure you could find some people there would do it pretty cheap.

How many levels? How big?

I don't have exact level counts to share, but the screens are basically like my Armand game in the Blitz Showcase forum - using 32x32 tiles in several layers to build 640x480 or 800x600 screens.

At this point I'm just looking for experience with the process, and where to look when I'm ready for the help. I need to clean up my screen building tool first, since it's really quirky at the moment. I understand it, and can work around its limitations, but other people would hate it.