On July 10, the Democratic National Committee announced that delegates to the national convention can vote electronically for president, vice-president, and platform changes. Each delegate will be e-mailed a ballot and that delegate can fill out the ballot and return it electronically. See this story. The voting period will be August 3-15.
There were some Libertarian Party activists who argued that the Libertarian Party needed a physical convention to nominate for president and vice-president, and that to go without a physical meeting risked breaking the election laws of a few states. The Democratic Party decision seems to show that those fears were groundless. Thanks to Michael Drucker for this news.