What APs - motorcycle related have you downloaded. What's your assessment?

Can anyone recall reading an article in a recent ON magazine about an AP downloaded to an itouch.

The author was using it in his garage as a reference while working on his bike.

I've stupidly left my back issues at my parents house, 5,000 kilometers away, and since I've just purchased an itouch I'd like to load it with at least one practical AP.

Any assistance would be much appreciated.