I have a over 5,500 miles on my current bike since Feb '13 and in the last 8 days I've popped 3 rear spokes on my commutes and group rides. Before this I've broken only 1 other rear spoke (back in August I think) and that was when I hit a big bump with a very heavy load in my panniers and I heard it pop.
I've had them all replaced by the LBS and on the most recent trip the guy mentioned that it looks like my rim took a big hit at some point and has a slight divot in it (making it not perfectly round) and that overall, my spokes seemed to be low tensioned. I had him replace the spoke, true the wheel and re-tension all the spokes (and true it again). Today after my group ride, I check my bike and sure enough, another spoke is broken.
Is it time to cut bait with this rim and rebuild the wheel or replace the whole thing?