FF13-2 has appeared on steam and comes with a bevy of options that wasn’t available in the original port of FF13 including custom resolutions and graphics options. Along with the much asked for Japanese voices. Currently if you preorder it is 10% off or $18. As Squarenix mentioned the whole trilogy will be released by March of next year and this is the 2nd of the 3.
You can get the game here: http://store.steampowered.com/app/292140/