Hacker News on 29 July 2013

• Kathy Sierra: Your app makes me fat
• Heart Surgery in India for $1,583 Costs $106,385 in U.S.
• Groupcache: an alternative to memcached, written in Go
• Tox: secure messaging for everyone
• Why YouTube buffers: The secret deals that make and break online video
• Identical Droplets in the DigitalOcean: Regenerate your Ubuntu SSH Host Keys now
• US patent office rejects claims of Apple 'pinch to zoom' patent
• Momentum Builds Against N.S.A. Surveillance
• Bitcoin ruled illegal in Thailand
• GPS signals are surprisingly easy to disrupt