That got your attention, didn't it?!?!
I just had to share that I just bought and installed the www.flashzebra.com replacement foot for a 580EX that includes a miniphone sync jack for use with remote triggers (I have Pocket Wizards). This thing is awesome.
I also have a brand new 580EX II, but wanted to have my 580EX have the same remote sync capability as the II.
Installation was a snap. It took maybe 5 minutes, and that included dropping one of those dang little screws and having to find it. Of course, it rolled to the exact center of the table where I was working and these 53 year old eyes just ain't what they used to be.
Anyway, if you are considering buying a 580EX II but already have a 580EX, just surf to flashzebra.com and look under "products". Best $54 I ever spent, and if Lon accepts the old foot back in trade, I get a refund of $12. Very cool.
Here are some images of how it looks.