Hallo,
I haven't been to Ojos del Salado but a freind of mien who has been there told me he had paid 200$ (year 2000 and off season / May) Zosimo Maravi, Peruvian Tour, calle Infante No. 530 Copiapo, FONO : 52-216-309 y tambien 52-230-602, CELULAR : 09-447-7748, FAX : 52-217-604 y email : copaoro@tnet.cl to take their team of 2 from Copiapo to Laguna Santa Rosa (?) and the day after, from there to Laguna Verde / Refugio Atacama. Note: my freind is of Chiliean origins and is fluent in spanish. He is not sure the price and/or the address is still valid but you can at least try...
Good luck for both organizing and the climb,
Ario

entschuldigen,
that was all I had. I also looked for it in the Internet as well as on Chili white (name of the contact) and yellow pages (name of the company) and no entries...
Last chance: dailing the numbers. I'm still in South America, can give it a try ! If they still operate, I'll post the recent data

I can't help you much about transport on the Chilean side.
Just wanted to let you know I'm on my way to the Ojos area right now on the Argentinian side. I have other targets than Ojos, but may climb it a second time, when in the region anyway.
I'll be at the foot of Ojos in 4-5 days, so if you have any plans to head over to the other side of the border to Cazadero, Nacimiento, El Muerte or the Tres Cruces peaks, I may see you there. Easy to spot people in the open terrain there.

May see you around!

JC.

pity it didn't work.
Good luck in your South American project and keep us posted. I personally have interest as far as OdS.
Hasta luego,
Ario