I'm Gav and I live in the UK. I've ordered a Starfire GT4 engine from Transformercycles.com that will hopefully arrive before my birthday on the 9th (32 this year). I've been thinking about getting a motor for my bike for a while now and cant wait to get it installed on my old trusted steel framed mountain bike.
Hopefully i'll be saving a few quid on fuel too as its not just you Americans that run 12mpg cars for fun - I drive a Lancer Evolution as my daily driver and with rising fuel prices, it costs me approx £10 a day to run (I work about 6 miles away).
Getting rid of the Evo is not an option as I've wanted one forever so a motoredbike is the answer for me.
I'll get some pics up when i take some (gotta clear out the garrage first...)