hughie - 1:42 am on Jan 4, 2011 (gmt 0)

What i find scary about this kind of money being invested in facebook is that the core functions of the site,(messaging, wall posts, chat, friends etc) are fairly easy to replicate by a well funded and well built upstart.

Obviously there is a lot more to facebook than that but i can easily see a real challenger emerging over the next 2 years.