Bought in April this year, i still have mine. and I like it. I was tempted a couple of weeks back to get an M8 from my local dealer who has a mint, used one in stock, at a decent price but it would mean trading in / selling the RD1 to fund it.
I've been out this morning with both the RD1 and an M8 loaned to me by a friend. While the M8 is a good camera, I find very little special or different about it to encourage me to change. Yeah, the bigger screen is nice, the shutter seems quieter and there's a little less button pushing when reviewing images, but that's all.