Web 2.0 - what does it look like?

As the use of "Web 2 technologies" phrase becomes more common, I'd like to document what these differences are. One below:

Examples of the Change to the Read/Write Web

Web 1.0	Web 2.0
DoubleClick	Google AdSense
Ofoto	Flickr
Akamai	BitTorrent
mp3.com	Napster
Britannica Online	Wikipedia
personal websites	blogging
evite	upcoming.org and EVDB
domain name speculation	search engine optimization
page views	cost per click
screen scraping	web services
publishing	participation
content management systems	wikis
directories (taxonomy)	tagging ("folksonomy")
stickiness	syndication

Reference What Is Web 2.0