Got my first float this past winter. I'm lookin forward to using it everywhere - lakes, rivers, streams, Merrymeeting, you name it.
Shaw and Tenney in Orono makes a couple styles of sculling oar - which get rave reviews.
There's also a sculling site on the web that's very informative, and the Forum has a few Mainers on it (some of which are legendary scullers/builders). Lots of instruction there on making your own oar. Just do a search on "sculling waterfowl", and you'll find it.