another full size (home built?) paddler, I like this one, it seems fairly 'achieveable'...
http://au.youtube.com/watch?v=Z6xat1PS1R4&feature=related

Diesel engined! No real paddler, too noisy!

Andreas

Not every one's cup of tea, but the Paddellac web site is worth a visit. A interesting read of how a couple of American's had a dream: build a "paddle wheeler" and succeeded. See http://www.debw.com/PadAbout.html
The link above is one of three video clips available on Utube.
The link on their web page to the videos does not seem to work but the Paddleduck's link will get you to Utube and the other 2 videos are easily found.
Rob from down-under.

The Paddellac is definitely a nice boat to look at for ideas, if you can find their website (they have one, I'll try to post it later) they have alot of good pictures. It's a nice idea starter for building your own boat. This was the 1st site I found when doing my research. It's powered by a gasoline engine from a riding lawn mower not a diesel. Gives hope to guys  like me who can't afford a steam engine.