Sewer Tea sends you directly on a quest to save mankind from an unknown chemical threat that has originated in an underground laboratory.
Maybe I'll post some news tomorrow but as for now, take a look at the early steps of the light system in Sewer Tea.
EDIT: With the upgrade to Unity 4.3 and the new 2D tools fortunately this filthy and dirty light system won't make it into the game. Instead there'll hopefully be some nice Unity lights.
EDIT2: I'll update shortly with some screenshots showing the new light system I created for Sewer Tea.