Spoke snapped at the end of last riding season. Season prior (I think) I hit a lip in the road and knocked it out of true. One spoke was really, really loose; I forget if all I did was tighten just that spoke. I suspect I touched the two next to the problem pair. Never got it perfect, but it was good enough at the time. [Actually, after snapping it, I finished my ride home--and have been using for the last couple months in the trainer.]

This is a set of SSR's, 4 or 5,000 miles, known for spoke breakage. Low spoke count--20 I think? Paired design, I think is the term, as the spokes are not evenly spaced around the rim. Nothing high end, actually rather low end. I like the looks, but the tech is nothing to write home about. The rims have very little wear on the braking surfaces.

Edit: Found my old thread. Wow, I guess I hit that lip further back than I thought. In the thread it appears I just tightened the loose spoke (more or less). I never checked for radial runout back then though, to see if I had a flat spot on the rim.
http://www.bikeforums.net/showthread...98-Loose-spoke