How many of you actually see those in your browser?

I can. Opera6 with view->encoding set to 'automatic' and the CODE2000 font setup for unicode that isn't available in other fonts.

With this combination, the glyphs (from left to right) look like

• A front-loader washing machine.
• A whirly-gig washing line closed for the winter.
• A fingertip with dirty nail.
• A '50s era wooden telegraph pole.

If P6 is really going to use unicode operators, I can't help thinking that one of those available in this range would be more appropriate than >>op<<. But then, I guess the problem is finding one that has a reasonably intuative alternative that can be constructed from the standard ANSI set of glyphs.