Web analytics, web metrics, and how to use them to track and improve conversions

I found an interesting paper on Social Networks published by faberNovel Consulting (care of Read/WriteWeb) that shows two very interesting charts of information I've looked for, but haven't been able to find till now:

I've always wondered, by country, how much are social networks used, and how often?  This chart, above, attempts to answer that question.

The next chart shows just how different Social Networks can be - Real Identity, Size and Types of interactions above.

I haven't had time yet to read the entire study in detail, which I'll do over the weekend - the PDF file includes a case study of each of the Social Networks profiled here.