From the interview:
"We want to be as free a players as possible. We've been observing Radiohead and Trent Reznor and in twenty-seven years or however long it takes for the next record, we'll be looking forward to everything in terms of possibilities with the Internet."
Their upcoming album is their last on contract with Warner music, so the move into an online distribution world that cuts out the record company middleman would be very enticing for a successful band like them.
The interview also has a few other juicy nuggets, like their love for Guitar Hero and, in a way, their thoughts on record stores versus iTunes.
If Metallica are looking to make money through file-sharing their music like Radiohead and NIN, we could finally see an end to the madness, a reduction in piracy and peace on earth. Peace on earth with metal, that is.