Personally, I wouldn't want Apple to "open up" fairplay. But, my reasoning seems different to other posters here.
I can already play my iTMS songs on all my devices without too much of a problem. Obviously they work great on my iPod, but I can also play them in my car CD player (and on the CD player in my living room, but thanks to AirTunes and Salling Clicker that doesn't happen so often these days),
and on my Nokia N80.
OK, so to play them on my Nokia N80, I have to burn them to Audio CD and then re-rip them into iTunes as MP3... and i have to use SyncTunes to get them onto the N80's memory card... but that's a routine I've gotten used to, and there's no noticable loss in sound quality.
So, the music industry
thinks iTMS is selling DRM-protected music (so it is happy, and continues to push more and more content into the iTMS), and I can strip off that DRM pretty easilly so I can do exactly what I want with the music
that I have paid for. And BTW, I don't share my music collection with anyone.
If Apple opened up Fairplay, then the music industry might get cold feet, and start withdrawing content from iTMS, or insisting on stupid Zune-ish iPod tax and stuff.
So, I know the current situation isn't ideal, but frankly I'm happy enough. Let FairPlay stay as it is.
SL
PS: The irony is that the N80's MP3 player is so lame that most of the time I don't bother using it, and just carry my iPod round with me anyway. Roll-on the iPhone!