multiple flashes into safe sync?

Is it ok for me to connect three flashes into a wein safe sync into my 10D? I know of course they work for one but I haven't read anything about multiple flashes yet.. thanks

ps it'll be two vivitar 285HV and a canon 550ex

It's not a good idea to connect various flash units, particularly those of different designs, in parallel. Connect one to the camera and use optical slaves for the others.

How good do the peanut slaves work?

I have lots of peanut slaves in my peanut army, they're small but effective if you have enough of them. I send them into battle with the chocolate army and eat the casualties.

Which brand? Are we still talking Wein here, as several companies make "peanut" slaves?

Yes wein.

The plain (NOT the "digital" version) Wein Peanut slave works just great. I have several that I use on the ends of PC cords to allow different flash units to be able to "see" the primary flash going off when the built-in optical slaves are positioned wrong.

The "digital" Peanut slave that I own, however, is quite useless to me. I could go into depth about that, but the bottom line is that they have to be used with an automated primary flash (ETTL or equivalent) that emits a pre-flash for exposure calculation. The flash being slaved by the "digital" Peanut is unknown to the camera and/or the primary ETTL flash unit, and will very likely cause overexposure in the image when it goes off in sync with the primary flash unit's main flash.

Sounds like you need a few more days away...

Is that how we end up w/ gobbers

I just used it on a shoot yesterday. I didn't use any optical slaves just had (2) vivitar 285s and a 550ex all connected to my 10D with sync cords. worked perfectly fine.

That's not a good idea. You could possibly damage the camera's switching circuits depending on the combined current draw of all the flash units. It is MUCH better to connect only one flash to the camera and slave the rest. It's your decision, but please consider the camera's safety.