It comes out on my birthday
I will buy 2 copies, one to keep in the plastic, and one to listen to.
It can't possibly be the second serving of Blackout though... Blackout was like one fluid groove the whole way through & 'Hold it Against Me' is a song I only listen to on the principle that it is Britney Spears and for the breakdown @2:10... Til The World Ends, ugh

'Inside Out' from the 15 seconds I heard seems like my fave so far, I think it will probably be moreso in the vein of a classic Britney record where she has more input than just her vocals in the studio (excepting Blackout where she was the executive producer), which usually consist of highs, lows and stuff in the middle.
I think it will be a slight improvement of Circus, though no track will top Womanizer, but maybe I will be proven wrong
and if she could write a song with stronger lyrics than 'Mannequin'... I'd probably shed a few tears.