Q Entertainment has confirmed that development is ongoing for a sequel to the 2006 Xbox 360-exclusive, Ninety-Nine Nights. Ninety Nine Nights 2 will once again be exclusive to the Microsoft console and is reportedly already half-finished.
Feelplus, a division of Microsoft games Studios, is handling the development of this one and is shooting for a 2009 release in Japan. No US announcements yet but we might hear something during E3.
I found the first one a bit tedious, so I'll put off making any decisions about this one until I see some gameplay. Hopefully the years since the original's release will result in a better sequel.