$160; not compatible with the D40 though. "Ideal GPS receiver for Nikon DSLR camera! Just simply attach the device to your Nikon camera, all the photos taken are geotagged with precise location (longitude, latitude, altitude and heading) and UTC time information. Compare with the Geotagger N1, the advantage of N2 is able to provide the heading information."

$50

"In the end, I’d have to say that both SanDisk and Samsung look like they might be superior wholesale vendors to Kingston for memory cards due to their more direct control of their respective supply chains."