Yep, also could not find the MW600 any where (or it was ridiculously overpriced).
Yeah, no FM in the Note 3 does suck, but this SBH52 is a good companion for something like the Note 3. (I also use my headphones ALOT and they always get tangled either in my clothes or stuff I walk past (especially when working in the garage)!
Seeing it should be available from End September 2013.
Some things I am looking forward to
1) Splash Proof (should work thus in the gym)
2) Can use for up to 2 Bluetooth devices (will see how this works out)
3) Can use it as a "micro" phone

to answer and talk to others! Cool
I have already downloaded some of the "Sony" apps for this on my S3 (and works - obviously without the SBH52 at the moment)...
Johan