Today Ive made small proof of concept for solution showing the latest image without any additional server-side script from Pixelpost. As the text at the link is at english then this note will be also only at english.
You can read more about this solution here – http://blog.piotrgalas.com/projects/latestPhoto/

PS This is probably one of the first notes for which Ive made this blog…maybe except whole addons stuff 😛