I tried it on my kubuntu i386 netbook earlier today. The ppa installed ok and when I ran 'netflix-desktop' for the first time the wine installer downloaded and installed mono, then proceeded to install firefox. I noticed some errors but didn't look at them very carefuly.
I ran 'netflix-desktop' again and it said 'firefox.exe not found' at which point I gave up.
I ran 'netflix-desktop' again and it said 'firefox.exe not found' at which point I gave up.