Hi skarz,
i know that feeling

, I've been using a mono for a few month now and it sure is a very demanding technique. ("finswimming technique is quite simple and effective once mastered." is cute

sounds like "if you can do it, it's simple"

) But monos definitely rock.
Unfortunately there is not too much info available on the net. You can have a look on Peter Pedersens 200m WR dive:
http://www.danskfridykkerforbund.dk/video/DYF-Pedersen200m.mpg . It gives a good impression on how it should look like. *g*
If you have somebody that can take UW-videos of you, that helps a lot. Getting some training with somebody who actually knows what he or she is doing of course is the best solution (in monofinning, everything is connected - so if you change a little part, it might effect the whole system or something you didn't want to be effected). If you are not the only monofin-using person in your area it might be possible to organize a course. That's what we did (Peter Pedersen does courses). It was phantastic and definitely worth it.
Veronika