"You wanna know what a PLE is? Its called your head."
I said a similar thing in a comment on Tony Karrer's blog the other day:
Isn't the main tool of the PLE our very own little brains? It's the best software around and completely portable. I can take it with me from job to job; from hobby-project to family life. It's personal and personalized. It's mine and a corporation can never ever own it...or can it?
Tony came back talking about all the tools he uses as an extension of his brain. This is true. We use technology for storage. But as Mark points out, that's different from "learning."
So maybe the PLE that we're all talking about here is really a Personal Hard Drive. It's a storage place for all that information. Late, we go back to our various storage facilities for all the hard-core processing we do with our brains.
Nevertheless, the storage facility does support the learning process, doesn't it.