New show has very little to do with the old show, which I hated BTW.
Boomer is now an Asian female and is also one of the 12 Cylon human models. We only know what 4 of them look like at this time. Also there are many copies of each model and they can't die since if their body dies they just wake up in a new one. The Cylons are on some kind of mission from god and this is why they nuked the humans home world. There is also a copy of one Cylon that only exists in Baltar's head.
http://scifi.com/battlestar/
Mini moves synopsis can be found here with some good video from the two part mini movies.
http://scifi.com/battlestar/mini/about/recaps/
In order to make any sense out of it all one needs to watch the two part mini series from 2003 and then watch last year's weekly series. IMO it is some of the best writing that I've ever seen on TV and is also better then most of the stuff being released at the movies these days.
You can get the mini movies and last year's season on DVD now