Do the buzzwords "Wiki", "Facebook", "Twitter", "RSS", "Digg" resonate with you? If you do not know any of these and you are in IT field, I guess you have to start reading more. :)
These websites have also created some new verbs like Google - while you are googling any of the terms above, someone else is digging an article, your friend is getting "poked" in Facebook (this is where you click a button and a line pops-up on the other person's page saying they've been poked), you wonder "What are people twittering about?". Then, your application is no longer a portal but a mashup and apple is bricking its iPhone. Brick is not even in Wiki encyclopedia yet, it is a term made popular by apple for making iPhone into unusable "brick" if users install unauthorized software.
Above all that, Iphone still has such a cool interface and Apple products always win in usability. See right picture.
Below are 2 videos that explain about Digg:
I think I will not start using Digg, Twitter or Facebook for now. Also trying Friendster but not really keen. But I am totally addicted to RSS & Wiki.