Use BlockChalk on your mobile phone to leave messages on your block, your street, at the coffee shop, or anywhere you happen to be. Respond privately or publicly to messages from people in your neighborhood. It's easy: you don't even have to sign up.
Download it for your iPhone here: http://bit.ly/6a9ZQn
Download it for your Palm Pre or Pixi here: http://bit.ly/4S
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