- Web 1.0 was about reading, Web 2.0 is about writing
- Web 1.0 was about companies, Web 2.0 is about communities
- Web 1.0 was about client-server, Web 2.0 is about peer to peer
- Web 1.0 was about HTML, Web 2.0 is about XML
- Web 1.0 was about home pages, Web 2.0 is about blogs
- Web 1.0 was about portals, Web 2.0 is about RSS
- Web 1.0 was about taxonomy, Web 2.0 is about tags
- Web 1.0 was about wires, Web 2.0 is about wireless
- Web 1.0 was about owning, Web 2.0 is about sharing
- Web 1.0 was about IPOs, Web 2.0 is about trade sales
- Web 1.0 was about Netscape, Web 2.0 is about Google
- Web 1.0 was about web forms, Web 2.0 is about web applications
- Web 1.0 was about screen scraping, Web 2.0 is about APIs
- Web 1.0 was about dialup, Web 2.0 is about broadband
- Web 1.0 was about hardware costs, Web 2.0 is about bandwidth costs
(via Copacetic)