Apple Lossless is supported natively- I'm listening to it right now. Not sure about AIFF, but with ALAC, there is no need for AIFF.
As for the streaming side- keep your eye on Apple's WWDC in June. As we know Apple bought Beats, which is supported on Sonos. Apple intends on rolling out a new service with combined functionality of Beats and iTunes Radio. And though in the past Apple hasn't cross platformed, word has it that they are coming out with a Android client for the new service, so I wouldn't at all be surprised to see the new streaming service supported on Sonos as well.