Update III: The Ohio Coalition for Medical Compassion, a grassroots effort in the truest sense of the word, is working on collecting those 1,000 valid signatures still. You can download a petition from their site and get to work, if medical marijuana is your speed. They hope to collect 2,500 in total over the next two weeks, but they clearly need some help — they sport just 431 Twitter followers, which isn't the most precise way of measuring support, but it's not the worst.
Update II: Of the 2,143 signatures collected by the group behind the medical marijuana amendment proposal, 1,000 needed to be valid to move the process along. No dice. Ohio AG Mike Dewine certified only 534 as valid, leaving the group 466 short.