How long time can I expect to wait before my picture occurs in the running slideshow?

Once You send Your picture it will be prioritized to be shown in the slideshow before pictures that have previously been shown. As such, usually You will see Your picture wihtin a timespan of 1-3 minutes. But it also depends on how many seconds the host has configured the slideshow to display every picture. Variation on waiting time before a new picture will be shown may occur. The size of the picture and the connectivity of Your device are also parameters that will affect delivery time. All pictures are queued into a fair share model called FIFO. (First in, Firstout).