There is a lot of talk about Google+ being more of a threat to Twitter than Facebook. While I don't deny that is true, I think Twitter still allows for great social discovery. When people retweet or reply to tweets it engages people from the outside.
A while back I wrote a post about using Facebook's Thrift. One comment asked me to post the PHP client used to connect to the C++ server I was demo'ing. Most of the client is boiler-plate code generated by Thrift, so I chose to omit it at the time. Here it is: