Where can I find information about gadgets and stuff in general?

I have a 5 minute speech to prepare for my classes and the topic I chose is "Gadgets". Basically I want to write about gadgets(for example like any new cell phones, the wireless technology like WiFi or Wimax, portable media players, etc.) and how they are useful in our day to day lives, be it for entertainment purposes.So I need some information for writing my speech.

Thanks in advance people.Where can I find information about gadgets and stuff in general?Wired.com has some great links/articles about gadgetry.