I'm not really sure what you mean by "Second Season". There already has been part of the second season shown.
http://www.tv.com/battlestar-galacti....html&season=2
The last episode shown was a cliff-hanger (which I think was midseason).
The show is utterly briliant. It pisses all over the original from a great height in so many ways - although I wouldn't even bother comparing the two. Try to forget the original when watching it, and you'll realise it's easily the best sci-fi show in years.