A few Social networking type examples
More Newspapers in Drupal
Dagbladet Information (Copenhagen, Denmark).
Die Welt (opinion site) (Berlin, Germany)
Die Zeit (subsite) (Hamburg, Germany)
Magazin24.se (Köping, Arboga and Kungsör, Sweden)
National Business Review (New Zealand)
New York Observer (New York, NY, USA)
Otago Daily Times (Otago, New Zealand)
Rue89 (France)
SavannahNow [Savannah Morning News] (Savannah, GA, USA)
Seattle Times | NWSource.com (Seattle, WA, USA)
El Espectador | elespectador.com (Bogotá - Colombia, South America)
The Jakarta Post (Jakarta, Indonesia)
Local newspapers
Adrian Journal (Adrian, MO)
The Beaufort Gazette (Beaufort, SC)
Bluffton Today (Bluffton, SC, USA)
galwaynews.ie [The Connacht Tribune Media Group, Galway, Ireland]
The Island Packet (Hilton Head Island, Bluffton, SC, USA)
Jamaica Plain Gazette (Boston, MA)
MyClaySun, MyNassauSun, Frenship Today (Frenship/Lubbock, TX, USA)
MyMandarinSun, MyStJohnsSun [Florida Times-Union] (Jacksonville, FL, USA)
The News Tribune (Tacoma, Wash.)
Weeklies
The Citizen (Fayetteville, GA USA)
The Georgia Straight (Vancouver, BC, Canada)
North Augusta Today (North Augusta, SC, USA)
That Other Paper (Austin, TX, USA)
The Onion
Weekly Dig (Boston, MA, USA).
Tiraspol Times & Weekly Review (Tiraspol, Pridnestrovie)
Online Newspapers
Gazeta KG (Kirghiz Republic, also known as Kyrgyzstan)
uusisuomi.fi (Finland)
Evanston Now (Evanston, IL, USA)
SK Today - online news from Slovakia (Bratislava, Slovakia)
Westki.info (Belarus and Lithuania)
La Hora de Salta Noticias de Salta (Argentina)
Philanthropy Journal (Raleigh, NC, USA)
College Newspapers
The Cornell Daily Sun (Cornell University; Ithaca, NY, USA)
Columbia Spectator (Columbia University; New York, NY, USA)
Stony Brook Independent (Stony Brook University; Stony Brook, NY, USA)
Olivet College Echo Newspaper (Olivet College; Olivet, MI, USA)
InsideVandy (online community for Vanderbilt University, Nashville, TN, USA)
Ecommerce
Below is a very short list of other companies who've chosen the framework recently.
All the links are to the Drupal sites.
1) FedEx : A very well known express delivery company
2) The United Nations : A site that supports and inspires
people from around the world to take action in support
of the Millennium Development Goals.
3) Nike : A well known sports site with a large database
4) Warner Brothers Records : A huge site with a very different
Theme for drupal.
Community Portal Sites :
1) Team Sugar : Womens social network and community
2) Lifetime TV : massive Drupal site with a movie database,
television schedule, videos,
photos, editor-produced articles,
user-produced stories, games, tag
clouds, topic-based search,
and beautiful theme.
3) Project Opus : Local music community.Music events and people
where you live; free music hosting and play list.
4) Adrenaline Hub : The action sports community site with
news aggregation and video upload.
5) Global food network : A superb community site related to
food...recipe's , videos, blogs, groups and much more.
6) Gallery : A community site with photo upload great forums.
7) Now Public : A busy news site with features like Write a Story,
Upload Your Photos, Video & Audio and
Highlight a Story You're Reading
8) Our Media : Video producers and podcasters use Ourmedia
to show off their works and create communities of interest.
A site with audio and video upload and features like
Create your own channels!
Learn how to create cooler media
Grab rights-cleared footage & music
Upload your work to multiple sites
You own your media - no lock-ins!
9) FastCompany : A site with all social networking features,highly
interactive
10) Popular Science : Another informational site of a variety
of subjects with great social networking features
11) Forbes : The forbes.com office pranks network site.
Even the most serious business person needs to have a little fun.
Forbes.com has introduced the Office Pranks Network with
features like Submit and share
your office prank and vote/comment on other office prank videos!
Ecommerce :
1) Blankstyle : An ecommerce site selling all types of clothes and
accessories. Online shopping accepts all types of credit cards.
2) Zazzle : An ecommerce site for creating and selling t-shirts
3) Muziek-en-lectuur : A Germany site with a huge database
selling music cds and albums.
Educational: 
1) Harvard Science : Science and Engineering at Harvard
Universtity Site with a superb theme and great features.
Magazines & News:
1) Amnesty International : A news site..media,library,
campaings etc
2) The New York Observer : Best In Magazine
3) Twit Netcast Network : deliver podcasts
4) The Onion : American news site,very popular, with lots of
features
http://usmagazine.com/
http://theworld.org/
http://www.brusselsjournal.com/
Video & Photography:
1) Flixya : A Video Sharing site with social networking
features
2) SonyBMG : Britney Spears Blackout Magazine: Videos,
events, photos,Lyrics etc.
3) Warner Bros Records : Audio,Video .. a whole world
of entertainment by warner bros.
http://www.monabrooks.com/
http://broadbandsports.com/
Services:
http://www.seoposition.com/
http://ilign.com/
http://www.kizmetinteractive.com/v2/
Government & Public use Sites:
For all types of sites in drupal with superb themes please contact