Interesting thread!
Met through being students together in college.
Met as I was reading the bulletin board at the women's center in the city I was visiting.
Met when I audited a women's study class at my alma mater (engineering students don't have the time for such things!) - she looked back at me, smiled one of the nicest smiles I've ever known, then offered me some candy.
Met through mutual friends, and I was near-obsessed with her for months before she'd actually date me.
Met through our involvement with a local lesbian organization and participation at one of their annual events.
Met through butch-femme.com personals.
And now.... who knows where my next love will appear.