Facebook was number 5 in the list
http://www.youtube.com/watch?v=siipB-1ZoacAny way the full list
1. Sunshine 2. Internet connection 3. Clean drinking water 4. Fridge
5. Facebook 6. NHS 7. Cooker 8. Email 9. Flushing toilet 10. Mobile phone / smartphone 11. Tea and Coffee 12. Washing machine 13. Shower 14. Central heating 15. Painkillers 16. Fresh vegetables 17. Vacuum Cleaner 18. Kettle 19. Sofa 20. Shoes 21. Fresh fruit 22. Google 23. Car 24. Hair straighteners 25. Public transport 26. Laptop 27. Chocolate 28. DVD Player 29. Wristwatch 30. Make-up 31. Flat screen TV 32. Wedding ring 33. Tumble dryer 34. Bottled water 35. Ebay
36. Bicycle 37. Ipod 38. Air conditioning 39. Disposable nappies
40. Light bulbs 41. Spell-check 42. Sat Nav 43. Push-up bra 44. Nintendo Wii 45. iPad 46. Gym Membership 47. Season ticket to your football club 48. Freezer 49. Xbox 50. Twitter
Strangely enough, clean underpants aren't listed by the Brits if the electric grid goes down.