I knew I should have posted this to the forum. I'm still not sure if it will work, but I'd been working on a Samchillian clef for some time, since Leon haphazardly mentioned it on his website quite a while ago. Every time I'm on the phone with a customer lately, I find myself doodling. A good third of them turned out to be samchillian clefs. I'm worried it looks too much like a del signo, but I hope that the steam iron pointer in the middle makes it different enough.
http://www.1up.com/do/imageDisplay?id=3406751
*The new link works, my previous attempt at img - I don't think it did.*
In addition, I was asked the 'why do we still use five lines' question. I would say that the reason we use five lines for conventional notation is that it keeps too many notes from looking like one another.
I have commonly heard it said, mostly about Tetris, that we tend to only remember seven things at a go, and that's why there are only seven pieces in Tetris, and phone numbers tend to be seven digits - I think that's Amerocentric oversimplification. I think seven is a good number and may work for the general populace, but any wind player remembers a lot more things in a group than that. (And four of the seven Tetris pieces are two reflected pairs.)
On the other hand, if there were, say seven or more lines in conventional notation, I would worry that a C and an E look too much alike, lost in the interior like a jungle party without their native guide. Better that we have ledger lines and notes look unique than having to second guess a note. I know it would totally screw up my sightreading.
For Samchillian, I suspect that if one had used more lines from day one, it might not matter as much, since a new instrument might form new mental associations.
If this gets used as a movable clef, the steam iron points to MV+0.