What mode did you use? The photo is underexposed.
Seems strange the shooting mode is missing from the EXIF data.
EXIF IFD0
* Camera Make = NIKON CORPORATION
* Camera Model = NIKON D5000
* Picture Orientation = normal (1)
* X-Resolution = 72/1 ===> 72
* Y-Resolution = 565/1 ===> 565
* X/Y-Resolution Unit = inch (2)
* Software / Firmware Version = Adobe Photoshop CS3 Macintosh
* Last Modified Date/Time = 2010:12:06 19:35:15
* Unknown tag, Tagnum 0x013c = data ===> Mac OS X 10.5.8
* Y/Cb/Cr Positioning (Subsampling) = centered / center of pixel array (1)
EXIF Sub IFD
* Exposure Time (1 / Shutter Speed) = 1/60 second ===> 0.01667 second
* Lens F-Number / F-Stop = 28/5 ===> /5.6
* Exposure Program = n/a (0)
* ISO Speed Ratings = 800
* EXIF Version = 0220
* Original Date/Time = 2010:12:05 13:34:29
* Digitization Date/Time = 2010:12:05 13:34:29
* Components Configuration = 0x01,0x02,0x03,0x00 / YCbCr
* Exposure Bias (EV) = 0/1 ===> 0
* Max Aperture Value (APEX) = 18325/3649 ===> 5.02
Max Aperture = /5.7
* Metering Mode = pattern / multi-segment (5)
* Light Source / White Balance = unknown (0)
* Flash = Flash fired, auto mode, return light detected
* Focal Length = 55/1 mm ===> 55 mm
* FlashPix Version = 0100
* Colour Space = 65535
* Image Width = 2259 pixels
* Image Height = 3388 pixels
* Image Sensing Method = one-chip color area sensor (2)
EXIF IFD1
* Compression = JPEG compression (6)
* X-Resolution = 565/1 ===> 565
* Y-Resolution = 565/1 ===> 565
* X/Y-Resolution Unit = inch (2)
* Embedded thumbnail image: