Hey @Clorofilla! Jeff here from the Spark team. I found a couple of other threads that may be useful to you:
Read closer to the bottom of the thread on this one. Seems like the consensus is to use a UART camera to be able to snap photos and upload them to the cloud. Someone mentions this Grove camera specifically as an option:
http://www.seeedstudio.com/depot/Grove-Serial-Camera-Kit-p-1608.html
Here's another thread that has some code/troubleshooting of a LinkSprite camera with TTL Serial:
Looks like either would be a good option. Hope this helps!