The Haiku Foundation provides an excellent central point for accessing information on haiku publications, competitions and other events happening around the world. The Haiku Foundation Events Calendar can be found at:

http://www.thehaikufoundation.org/event_calendars/

Some other key national haiku web sites are:

Haiku NewZ http://www.poetrysociety.org.nz/haikunews

Haiku Society of America http://www.hsa-haiku.org/

British Haiku Society http://britishhaikusociety.org.uk/