Personal Learning Network?

Anyone out there have their own Personal Learning Network?  I'm working to figure out how to create my own and would like to find out what people are using.  Are you a blogger?  Are you a tweeter?  Do you make Facebook connections?  Do you bookmark your educational favorites on Delicious?  Are you a Pinterester?  I'd like to hear some of the ways that you are building your collaboration with other educators.  Share away and let's help each other!