Exciting developments in the movement to end marijuana prohibition keep flooding my inbox. Here’s just a sampling from over the weekend: Citing a new survey, Ryan Grim gives more credence to the idea that marijuana ballot initiatives could help Democrats drive “surge voters” to the polls in 2012. (Something I’ve written about a time or two.) A survey making the rounds among strategists, which has yet to be made public, indicates that pot could be just the enticement many of these voters need: Surge…