proxy cache
Somewhere back in the previous millennium, when a dual ISDN line was something most of us could only dream off, we had bundled ISDN as our office connection to the internet. We quickly realised that about 90% of our traffic was through the same websites, so set up a caching proxy [i think in our DMZ]
This improved responsiveness a lot, and everyone was happy.
I then realized that all the images downloaded were also being cached under the cache folder with some random name.
At some point I thought it was a good idea to put something akin to webcollage (pointing to that cache folder) on the machine (ssh -X and all that) which would add the latest downloads to the display
The first 10 - 15 minutes this was quite fun, as you would see news pictures flash by, and you could try to guess which wesbites people were looking at.
And then other pictures started to flesh by ...