The Eye-Fi card sends the pics to your destined computer (in this case it would be the N900) over WiFi. No cables needed.

Incredibly convenient. Being able to do that with the N900 would be great to be able to carry some pics of loved ones with me even more easily when I travel, and, perhaps more imporantly, never run out of SD card space in the camera when out and about (being able to just load some to the N900 and free up space on the card).