In a fit of procrastination some time back, I started a Wikipedia article for African Red Slip. I've just added a bit today. Improvements can be made on the page itself (hint, hint).
A note on capitalization: wiki-style prefers lower-case. See the editing history for the change from "African Red Slip" to "African red slip". Many archaeologists may think of ARS as something of a proper noun. Either way is OK by me.
And, boy, do I hate typing wikicode in those text-entry boxes. But it's all for a good cause.