tl;dr from OP: In the emails you send about your product, take a moment to remind the recipient what you do and what your value proposition is. Many won’t remember otherwise. Contains examples.
ec2-authorize default -P icmp -t 3:4
This will allow both "destination unreachable" (type 3) "fragmentation needed" (code 4) packets to pass CSS Custom Filters
Autocomplete API
Google Chrome Apps
ECMAScript 6
Web Components