The Panasonic RP-HD10 was announced in September and started shipping in December. They are currently only available in Japan and the UK. There is no NA release date (yet). But they are available in the US from Japanese importers on Amazon.
The RP-HD10 looks to be Panasonic's first serious attempt at a high quality headphone. The design is conservative but attractive. And I really like the look of the HP-HD10's iridescent MLF 50mm drivers!
Their specs state that they only have a 92dB/mW sensitivity but have a 1500mW max. input power rating. So the PR-HD10 will probably only sound its best when connected to decently powerful amp.
Their price is also very good. They are currently going for around $200 (plus shipping).
I'm very curious to find out if these are the real deal!