If you're looking for code samples, I've found that the best place to find them is in the archives of the jsdoc-users Google Group. I've had much better luck there than searching Google, and if you ask a question they're usually pretty good about helping out.
I can't speak for the Eclipse support, but there is a new version of jsdoc, jsdoc3. Check out the documentation here. It's a little incomplete, but I know they have updates written and ready for review, so they should be improving soon.
Regarding your specific question regarding @function and @memberof, you'll likely want to use @function, not @memberof for simple function documentation.
