1. Blogs (Johnson & Johnson, Delta Air Lines)

2. Bookmarking/Tagging (Adobe, Kodak)

3. Brand monitoring (Dell, MINI)

4. Content aggregation (Alltop, EMC)

5. Crowdsourcing/Voting (Oracle, Starbucks)

6. Discussion boards and forums (IBM, Mountain Dew)

7. Events and meetups (Molson, Pampers)

8. Mashups (Fidelity Investments, Nike)

9. Microblogging (method, Whole Foods)

10. Online video (Eukanuba, Home Depot)

11. Organization and staffing (Ford, Pepsi)

12. Outreach programs (Nokia, Yum Brands)

13. Photosharing (Rubbermaid, UK Government)

14. Podcasting (Ericsson, McDonalds)

15. Presentation sharing (CapGemini, Daimler AG)

16. Public Relations – social media releases (Avon, Intel)

17. Ratings and reviews (Loblaws, TurboTax)

18. Social networks: applications, fan pages, groups, and personalities (British Airways, Saturn)

19. Sponsorships (Coca-Cola, Whirlpool)

20. Virtual worlds (National Geographic, Toyota)

21. Widgets (Southwest Airlines, Target)

22. Wikis (Second Life, T-Mobile Sidekick)

Kaynak: mashable