Leibniz-edition - the current situation in Academy edition, research utilities and texts
LeibnizCentral - Das Wissenportal zu Gottfried Wilhelm Leibniz - In German, offers a wealth of material from virtual exhibitions to databases and videos. From Gottfried Wilhelm Leibniz Bibliothek. Here's some information about the portal.

Research centers

Leibniz-Archiv in Hannover (Reihe I. III and VII)
Leibniz-Forschungsstelle Münster (Reihe II and VI)
Leibniz-Arbeitsstelle Potsdam (Reihe IV) (English page)
Leibniz-Arbeitsstelle Berlin (Reihe VIII)

Utilities for the Leibniz-edition

Kumuliertes Sachverzeichnis (Reihen I, III, IV und VI) - from Leibniz-Edition-Arbeitsstelle Potsdam
Kumuliertes Bibelstellen-Verzeichnis (Index of the texts from the Bible) der Leibniz-Akademieausgabe - from Leibniz-Edition-Arbeitsstelle Potsdam
Kumulierte Schriftenverzeichnis für alle bisher erschienenen Bände der Leibniz-Akademie-Ausgabe ins Internet
Databases for Leibniz-research - from LeibnizCentral

Gottfried Wilhelm Leibniz-Gesellschaft - in Hannover
Leibniz society news / Leibniz society of North America
Sociedad española Leibniz - Spanish Leibniz-Society
Sodalitas Leibnitiana - Italian Leibniz-Society
Societas Leibnitiana Japonica - Japanese Leibniz-Society

Conferences

(Note! Cfp:s and announcements are most welcome to the Leibniz Discussion Board! They can also be submitted to markku.roinila (at) helsinki.fi)

The Early Modern Philosophy Calender - contains information on events and conferences etc., maintained by Stephen H. Daniel
IX. International Leibniz Congress: Nature and Subject, 26. 9. - 1. 10. 2011, Leibniz University Hannover
Leibniz resources - Philweb

Info, papers and photos from past conferences

Leibniz" in der Zeit des Nationalsozialismus, Hanover 23-25 of Sept 2010 Report in English, Report in German
Leibniz's Theodicy - Context and Content, Notre Dame 2010 - Videos of the talks in Youtube
Hans Poser: Bericht über den VII. Internationalen Leibniz Kongreß 2001
Papers from G. W. Leibniz, Nouveaux essais sur l'entendement humain (1704-2004) Montreal, Canada 30 September-2 October 2004
Photos from International Young Leibniz conference, April 2003 - slow, be patient!
Photos from Leibniz: What kind of rationality, Tel Aviv & Jerusalem 30. 6. - 2. 6. 2005
Photos from VIII. Internationaler Leibniz-Kongress 24-29 July 2006 Hannover
International Conference. Leibniz and Spinoza I, March 15-17, 2007, Ecole Normale Superieure - Lettres et Sciences Humaines, Lyon. Details and the programme can be found here (.pdf): http://www.helsinki.fi/%7Emroinila/LS.pdf
First Annual Conference of the Leibniz Society of North America, January 25-27, 2008
Rice University, Houston, Texas
Report (in German): Leibniz und die Ökumene. Internationale Arbeitstagung - by Hartmut Rudolph

Studia Leibnitiana - from G. W. Leibniz Geschellschaft
Leibniz Review - includes the contents of the latest review
Nova Leibniz - The volumes of the collection are understood as monographic research and have a length of about 100 pages

Homepages

Diogenes Allen, Maria Rosa Antognazza, Richard T. W. Arthur, David Blumenfeld, Gregory Brown, John Carriero, Marcelo Dascal, Francois Duchesneau, Javier Echeverria, Daniel C. Fouke, Gideon Freudenthal, Daniel Garber, Ursula Goldenbaum, Susanna Goodin, Emily Grosholz, Jaakko Hintikka, Nicholas Jolley, Eberhard Knobloch, Simo Knuuttila, Mark Kulstad, Mogens Laerke, Paul Lodge, Michael Losonsky, George MacDonald Ross, Jeffrey K. MacDonough, Murray Miles, Jürgen Mittelstrass, Massimo Mugnai, Enrico Pasini, Volker Peckhaus, Franklin Perkins, Pauline Phemister, Olga Pombo, Hans Poser, Nicholas Rescher, Justin E. H. Smith, Ezio Vailati, Catherine Wilson, Elhanan Yakira , Ohad Nachtomy, Michael J. Murray

Other

Leibniz scholars in Facebook
Justin E. H. Smith's excellent Philosophy Blog
Leibniz-Stiftungsprofessur, Leibniz Universität Hannover