I received my Single Ear Bud today (Right Bud Deluxe / MEP-101MR) from Scan Sound; ordered it last week after reading this thread...thanks Saralynn. They do not deliver true stereo sound but it does play the left channel I've been missing into my right ear very nicely and noticeably.
It was immediately apparent when I listened to a 1960's vintage musical stage recording where the left channel was barely audible with conventional ear buds...the same recordings sounds great now. I chose this older recording to test the Bud since I knew with the way they recorded back than I'd have a better chance of being able to tell the difference; I turned out to be right as the recording quality wasn't nearly as sophisticated as we'd find in today digital world.
I recommend anyone missing the full sound of stereo music give these are try...but don't expect to hear true stereo, you'll only hear both channels played in the same ear. In my opinion, they were worth the $29.00 I paid for them, a little steep, but still less than a good pair of Bose buds at $100.00, which you'll only use half of anyway.
Doc