Reid brought up an interesting note on the comments of that thread. He was essentially asking what the difference was between the question "How do I wirelessly transfer photos from my iPhone 4" vs. "How do I transfer photos off of my Nikon camera."
I do think there is a distinction between the two. With the former, while the data involved are photographs, the question is not specifically related to photography...it is an iPhone 4/Wifi question, a topic which definitely belongs on superuser.com. The same exact question could be made for an iPhone 4 for any kind of data, not just photographs. It may be on-topic here, but it is definitely on-topic at superuser.
The latter, transferring photos off of a Nikon camera, while similar in nature, is that it is on-topic here (it specifically deals with a camera and can only involve the transfer of photographs),
but probably off-topic at superuser.
On further thought, such a question about a Nikon camera is still probably on-topic at superuser.com.