For me easily best music of 2012 by band hadn't previously heard and serious contender for best of year.
GlobalFest 2012 in January (stream is on npr.org) introduced me to this joyful fusion, which takes what I remember of the spirit of the 70s heyday and mixes in some more recent influences to bring it right up to date, with musicianship on a par with Badume's Band (backing band of choice on Ethio-legends tour). You can listen to their EP on BandCamp and amongst the YouTube footage is their trip to Ethiopia with its collaboration with local musicians and enthusiastic reception of this. Don't be put off by so-so review in SongLines.
The First Listen feature (again on NPR but expired when album released) had me eagerly awaiting someone on Amazon.co.uk prepared to sell me a copy, The months since receipt have confirmed will be listening to this invigorating and varied sound far into the future. On Amazon 5-star system this would be about a 7 (I really like this).