Hacker News on 30 September 2010

• Thanks For Paying Taxes. Here's A Receipt.
• (How to Write a (Lisp) Interpreter (in Python))
• Why read books if we can’t remember what’s in them?
• Google offers JPEG alternative for faster Web
• There is no Plan B: why the IPv4-to-IPv6 transition will be ugly
• Wiretapping the Internet
• Beautiful Simplicity
• Google URL shortener available to the public
• Potentially Habitable Planet Discovered
• I Can’t Work Under These Conditions