Not fake. Charlie needs something to post.
The reason bus multiplier unlocked some later Athlon64 X2 and Phenom series chips were given the "Black Edition" branding, was because they didn't want to dilute "FX". When Phenom/Opteron Barcelona was being made, everyone had high expectations. They thought it would cream everything Intel had. Back then it was believed that unlocked Phenoms would carry the "FX" branding. The architecture fell flat on its face...back to using "Black Edition", enter Phenom 9600 BE. Plans to develop an FX model for socket-1207 (DSDC) were called off. TWKR is "limited edition", as its batch would have emerged from manual binning of the chip. It could be hard to find a chip that does 4+ GHz stable on water.
"FX" was always meant to be exclusive. AMD tried to first make it exclusive for socket-939, then fooled around with the lineup a bit (making the socket mainstream), and then pushed FX to Socket 1207, with only one AM2 model (FX-62) along the way. There are more socket-1207 FX models (FX 70, 72, 74) than there are AM2 (FX 62). The new FX will take over, though I doubt the upgrade path for NVIDIA nForce 680a SLI (that which drove FX-7x) will resume.
Yes, if Istanbul can run on s-1207, an AM3/AM2+ variant is possible. Don't expect future 6/8/12 core AMD chips to continue on the AM3 path though. The socket doesn't provide wiring for more than two memory channels.