As far as I know there are no luggage storage at the airport. But things at the airport are changing daily now, so I will have to check this again. I will be going to the airport on Sunday (my wife is leaving for a trip) so I will check it out, and ask at the information desk as well.
I saw in the papers today that RyanAir is getting ready to open their offices at the airport, flights start on Monday.
Greetings from Santiago,
Ivar