I wanted to test PanoMonkey but unfortunately it was a complete disaster. First of all I couldn't select my lense configuration from the list (Samyang 8mm with Nikon DX). Then the tool had trouble stitching the images, treating them as if they were normal / not fisheye images.
The latest version of Hugin did a great job, I didn't have to upload any images or buy any bananas. Hugin is free and does almost anything automatically.
The monkey however should go back to school for a few years...and pay me bananas for writing this feedback.