Originally Posted by Skydog
From my experience, yes. I should add, however, that regardless of the number of available, unsecured networks, the user must tap on "connect" before actually establishing a connection. But if one returns to a previously-connected network the Kindle will indeed connect automatically unless that particular network has been removed ("forgotten") from the list of networks.
Ok, then this behavior is exactly the same as with encrypted networks with the exception of not requiring a password to initially connect. fratermus' comment made it sound like the Kindle would automatically connect to ANY open network that it was within range of, even without user interaction.