Second Life
http://secondlife.com

There.com
http://www.there.com/

Lively (by Google)
http://lively.com/

General Virtual Worlds info

http://tinyurl.com/yvtmag

Terra Nova blog
http://terranova.blogs.com/
Sidebar contains links to over 50 virtual worlds, including the ones referenced on slides 5 and 6

Custom Virtual Worlds Builders:

Forterra Inc.
http://www.forterrainc.com/

UnisFair: "The leading provider of virtual events, virtual trade shows, and online job fairs..."
http://www.unisfair.com/

Virtual Heroes: Serious Games Design
http://www.virtualheroes.com/

Quaq Forums: Virtual Worlds Collaboration Solutions
http://www.qwaq.com/

NMC Virtual Worlds (education focused services)
http://virtualworlds.nmc.org/services/

Virtual worlds platforms (most in development):

Open Simulator
www.opensimulator.org/

Multiverse
www.multiverse.net/

Metaplace
http://www.metaplace.com/

ActiveWorlds
http://www.activeworlds.com/

Small Worlds
http://www.smallworlds.com/

Legal issues in Second Life:

Virtually Blind (by Ben Duranske, author of Virtual Law)

How lawyers can use virtual worlds

SL Bar Association
Informal professional organization within Second Life for lawyers and others with an interest in law.
http://slba.info (on the Internet)
http://world.secondlife.com/group/663a5618-d61c-34f6-b4de-bb7a4c26c514 (within Second Life)

Continuing Education series in Second Life (offering California MCLE)
http://slba.info/speakerseries.html

Galileo Law Directory
List of lawyers and other law-related groups in Second Life.
http://www.lawspotonline.com/lawspot/directory.jsp

How Law Librarians Can Use Second Life

Law Librarians of Second Life (in-world group)
http://world.secondlife.com/group/9e9bcdc5-172f-14da-42d5-e739938e58cf

Ning - Second Life Law Librarians group