Alright, I've been working on this for a while and I can't quite figure it out. The goal is to be able to let whoever wants to change the desktop picture on my powerbook pictureframe do it over the internet. It's a powerbook 5300cs-100MHz/16MB of RAM with a 3Com PCMCIA ethernet card that I just got working. It's currently running 9.0.4, but i'm downloading the 9.1 updater right now.
One thing I thought of was using a program like DP Autochanger. It can automatically grab a picture from a web address and set it as the desktop. It checks every minute for a new picture, so my idea was to use my own web server (Beige G3-G4/450, 10.4.5) and have a file called desktop.jpg which could be easily replaced by anyone using a PHP uploader. The PB would then look to that one address each minute and update the desktop. But I couldn't get that working, and I'd rather there be some kind of alert when there is a new picture put up. Any suggestions?