Question 1
Net revenue & employment
http://www.internetindicators.com/features.html

Question 2
http://www.jmm.com/xp/jmm/press/industryProjections.xml
http://www.commerce.net/research/stats/wwstats.html
http://www.nua.ie/surveys/how_many_online/index.html
An Internet strategy firm called Nua reported that 513 million people worldwide had access to the Internet as of August 2001.  A third of this population is estimated to be in North America (down from nearly half in 1999).

Question 3
http://www.forrester.com/ER/Press/ForrFind/0,1768,0,00.html
Forrester Research estimates that global e-commerce in 2002 will amount to $2.2 trillion.
http://www.nua.ie/surveys/?f=VS&art_id=905357306&rel=true

Question 4
 http://www.nua.ie and http://www.forrester.com