The Heavy Rain Won't Pour Until Next Year.

They cite concerns of the game getting "lost in the shuffle" as the main reason; with high-profile releases such as Modern Warfare 2 and Assassin's Creed 2 planned for the same timeframe.

It's a disappointing but it makes sense. With Heavy Rain being such an ambitious concept, an early 2010 launch will ensure the game doesn't get lost. Plus it gives Quantic Dream an extra couple of months to polish things out.