Have you heard of Dynolicious? I read about it in one of the Porsche magazines. Sound bloody fantastic. Its an app for the iPhones and iPods which, according to the article, gives you dyno results as accurate as the real thing. You can even print graphs of everything. All that for US$13, not bad at all
http://www.dynolicious.com/ 
Raf

I've got a vericom that I used to use to analyse the cars and bikes. Bought dynoliscious last year and I can tell you it's awesome and accurate!