Is there a resource for what these different kinds of chargers entail? So far I've figured out:
Blink has a membership that reduces the cost from $2.00 for the base guest rate down to $1.50 for a free membership and $1.00 for the plus membership that has a $30/yr. fee but is free through the rest of 2013. They'll mail you a membership card after signup.
ChargePoint requires a $5.00 fee to obtain a membership card and if you put a $25.00 balance and credit card on file they'll give you your first two charges for free. Unsure of their rates. Was poking around the Sea World chargers today (didn't take the Leaf) and it seemed like it would only accept credit cards that had the tap to pay feature... ? Didn't see a slot card reader. Rates weren't published but they're listed here as free. Didn't seem like it was free to me but that was the first one I've looked at.
Any others I should know about?
For those who want to use free chargepoint only, you can get a free chargepoint card here: http://www.chargepoint.com/leaf/
Save yourself the $5 fee.