Among the few people who use the Swiss French Keyboard, some might be interested in an Extended Swiss French keyboard that behaves like a Swiss French Keyboard, but can also input Greek letters, characters with the macron accent, and letters and numbers with a circle around them.
The explanation on how to install it is in French. If there are people out there who use a Swiss French Keyboard but who don't speak French, they should send me mail so that (a) I can invite them for a beer, I really would like to meet such people, and (b) I can translate the explanation for them :-).
[robg adds: Today seems to be the day for very specialized tips; if you think this one's for a small group of users, check out the next one as well!]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050927015534667