Megapixel wise, not in sheer size.
A 1,400 megapixel camera is being primarily used to hunt for earth crossing asteroids, but it is finding other interesting objects as well.
A quote from the article:
"Each image, if printed out as a 300-dpi photograph, would cover half a basketball court, and PS1 takes an image every 30 seconds. The amount of data PS1 produces every night would fill 1,000 DVDs."
Here is the full story from Astonomy.com:
http://www.astronomy.com/asy/default.aspx?c=a&id=9960
And another from Space.com:
http://www.space.com/scienceastronom...ids-10618.html