I don't really think in terms of personal learning environments and personal learning networks but more in terms of personal knowledge management plan, which I see as more action oriented and focused. To implement my personal knowledge management plan, I use a number of tools and techniques (my Personal Learning Environment) and I draw upon the people within my network (Personal Learning Network).
I'm still trying to figure this out but I don't want to spend too much time on terminology. It's personal in the sense that it is uniquely my creation and my responsibility. It's what works for me and what works for me is continually changing so I'd rather go with the flow rather than spent too much time defining what it is right now or what it has been in the past. The problem is with this approach is that it's difficult to have a conversation with other people - especially a conversation with 1000+ people- if we're all using similar terms to mean completely different things.
I'm repeating myself. I've blogged about this in the past (in February 2009). I probably said something different at the time.