Comparing some Web2.0 APIs

I’ve been looking at some Web2.0 APIs, and here is a simple comparison,

	Request Type	Response Type	Authentication	Documentation
Digg	REST	XML, JSON, Javascript, serialized PHP	API key required but no authentication.	Digg API
Wikipedia	Query string params	XML, JSON, serialized PHP	API key/Sign in not required to use API.	Wikipedia API
Flickr	REST, SOAP, XML-RPC	JSON, serialized PHP, XML, SOAP, XML-RPC	API key required.	Flickr API
Amazon	REST, SOAP	XML, SOAP	Acess key required.	Amazon API
Bing (formerly Live Search)	Query string params, SOAP	XML, JSON, SOAP	AppID required.	Bing API
Twitter	custom, REST	XML, JSON	OAuth required.	Twitter API
Facebook	REST	XML	API key required.	Facebook API

Multi-Touch Screen

Minority Report style multi-touch screens are a reality! Very cool!