Well, my 5500 came. I'm slightly annoyed that it took soooo long, and they are a good bit cheaper with faster shipping now from mp4nation, but them's the breaks.
The headphones themselves are very nice. They remind a little of the UE6000, except with better clarity and improved treble. I like them more than the Logitechs for sure. I paid roughly the same for both (got the UE6000 on the $70 deal).