Well, I was reluctant to reply, but your "everyone reply now" is pretty demanding.
Pollyanna's just my nickname. I was being stupid one day and said "Knock me down and call me Pollyanna!"...and..well..uhm.. people did. Pretty soon it became a joke and it kinda stuck for my screen name...
I still need one that nobody else has...but...I'm working on it. I was "Blue Fox" for ages, but I kept running into other Blue Foxes. Graaah.
Of course, if I really wanted to be original, I could go for "Hippie Troubador" or "Saucy Wench" which are two other nicknames, but I think Pollyanna will do for now.