Here are links to some of the subjects raised in Party of One, or otherwise related:

A new Party of One discussion group is now online at http://groups.yahoo.com/group/partyofone/
... it's by invitation only, so contact the moderator for info on joining.

Hikikomori (young Japanese hermits):
http://news.bbc.co.uk/1/hi/programmes/correspondent/2334893.stm

Anchoresses (medieval female hermits):
http://www.iffley.co.uk/annora.htm

Adbusters (the anti-advertising magazine):
http://www.adbusters.org/home/

Singlehanded sailing (solo sea voyages):
http://www.sfbaysss.org/
http://www.aroundalone.com/

The "Creative Class" (an emerging, lonercentric type of workplace):
http://www.creativeclass.org/

And here are links to some of the people who were interviewed for Party of One:

Pat Brown:
http://www.she-dc.com/pages/main.htm

Lynne Henderson:
www.shyness.com

Hiroaki Sato:
http://www.hiroakisato.com/

Deanne Stillman:
http://www.deannestillman.com/

Dean Wideman:
http://www.hg.org/experts/Dean-A-Wideman-M-Sc.html

David Wollock:
http://www.etiquetteforoutlaws.com

And here are some links to cool sites:

http://theantisocialclub.com

http://www.richieunterberger.com (he's the author of Turn! Turn! Turn! - the last word on folk rock, a lonerish musical genre if there ever was one)