I am looking statistics about internet penetration in europe, combined
with the demographics i.e. How many 25-35 aged woman use the internet
in spain ? Or how many of the italian onliners have a university
degree ? I am aware of statistics like eurostat / destatis or the
stats found at www.internetworldstats.com.

Having a single source would be the best, though multiple sources for
the countries Germany, Italy, France and the UK would be helpful as
well...

Hi, you can search in Aunthetic sites of European Union Members and
some other International Organisations like UN.
I have searched with the query Internet Penetration. I could get
results with demography. So below I have given some links. Hope this
would be useful.
Internet Statistics :

http://global-reach.biz/globstats/refs.php3
http://webreference.com/internet/statistics.html


International Organisations  :

United Nations Economic Commission for Europe :
http://www.unece.org/

Organisation for Economic Co-operation and Development
http://www.oecd.org/home/0,2987,en_2649_201185_1_1_1_1_1,00.html

United Nation?s International Computing Centre :
http://www.unicc.org/

United Nations Statistics Division :
http://unstats.un.org/unsd/

European union Member Countries :

Austria :
http://www.statistik.at/index_englisch.shtml

Belgium :
http://statbel.fgov.be/home_en.asp

Bulgaria :
http://www.nsi.bg/Index_e.htm

Croatia
http://www.dzs.hr/defaulte.htm

Cyprus :
http://www.mof.gov.cy/mof/cystat/statistics.nsf/index_en/index_en?OpenDocument

Czech Statistical Office
http://www.czso.cz/eng/redakce.nsf/i/home

Denmark :
http://www.dst.dk/HomeUK.aspx

Estonia :
http://www.stat.ee/

Finland :
http://www.stat.fi/index_en.html
http://www.asub.aland.fi/index.con


National Institute for Statistics and Economic Studies, France
http://www.insee.fr/en/home/home_page.asp

Statistics Greenland
http://www.statgreen.gl/english/

National Statistical Service Of Greece
http://www.statistics.gr/Main_eng.asp

Federal Statistical Office, Germany
http://www.eds-destatis.de/

Hungary
http://portal.ksh.hu/portal/page?_pageid=38,119919&_dad=portal&_schema=PORTAL

Ireland :
http://www.cso.ie/

Latvia :
http://www.csb.lv//avidus.cfm

Luxembourg :
http://www.statec.public.lu/en/

Malta :
http://www.nso.gov.mt/

Netherlands :
http://www.cbs.nl/en-GB/default.htm

This website offers insight in all statistical facts about the
Netherlands Antilles, consisting of the islands Bonaire, Curaçao, St.
Maarten, St. Eustatius and Saba. :
http://www.cbs.an/

Poland :
 http://www.stat.gov.pl/english/index.htm

Portugal
http://infoline.ine.pt/index_eng.htm

Spain
http://www.ine.es/welcoing.htm

Swiss 
http://www.bfs.admin.ch/bfs/portal/en/index.html

Serbia And Montenegro Statistical Office
http://www.szs.sv.gov.yu/english.htm

United Kingdom :
http://www.statistics.gov.uk/
http://www.gro-scotland.gov.uk/statistics/census/censushm/index.html
http://www.britainusa.com/consular/embassy/other_show.asp?Sarticletype=25&other_ID=451