My opinion - facebook is confusing, difficult to navigate, privacy controls are confusing, and they keep changing things up. few months ago there was an option to import your blog feed, and now its gone. Instead, you have to use some kind of app. And then controlling your apps gets confusing. If google can develop a social networking site that is easy to use, and respects my privacy, I will sure use it.
facebook will decline i think ..there is always new sites waiting to get its big push up in traffic and facebook will not always be 1
Did Facebook buy Orkut (just like they did with YouTube when Google Video couldnt compete?) or did they build it from the ground up?
"Facebook is an absolute phenomenon but there are other social networks which are successful too." Sounds like facebook have won this war