The Heroku Data Team just launched Data Clips, a deceptively powerful feature. From the Heroku Postgres Blog:

"Data Clips allow the results of SQL queries on a Heroku Postgres database to be easily shared. Simply create a query on postgres.heroku.com, and then share the resulting URL with co-workers, colleagues, or the world. Data clips can be shared through e-mail, Twitter, irc, or any other medium - they are just URLs. The recipients of a data clip are able to view the data in their browser or download it in JSON, CSV, XML, or Microsoft Excel formats..."

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Check out the Heroku Postgres Blog to read more.