Here are some useful links to other websites:

PolyOz

This site has a large number of resources. It is a bit complex to navigate but is periodically being revised to be more useable. On this site you can find forums, articles, personal ads and much more.

Wikipedia - entry on polyamory

A long thorough and very excellent article on poylamory, covering a wide variety of bases. If you are new to polyamory, read it. If you have been doing poly for years, still read it - it had some stuff in it that I didn't know, and has lots of good links to poly-related topics.

Polyamory - What it is and what it isn't - from the Electronic Journal of Human Sexuality 2003

Derek McCullough and David S. Hall, Ph.D have written an interesting essay, with citations, on polyamory. A good introductory piece covering many bases, including jealousy, nature and poly, the roots of the alleged "sinfulness" of poly, contrast with monogamy, and some useful reflective questions at the end.

Jealousy - unmasking the green-eyed monster

Incredibly useful article which contains an actual practical technique for desensitising yourself to jealousy (a bit like phobia desensitisation). Members of the community have tried it and it works (although it may not for everyone). The author, Kathy Labriola, is a counsellor in San Francisco with lots of
experience working with poly people.

Alt.polyamory

Homepage for the Usenet newsgroup alt.polyamory, with a host of excellent links including the deliciously facetious "How To Fuck Up: Guide of carefully tested methods for making mistakes in polyamoryous relationships" (http://www.faqs.org/faqs/polyamory/faq-supplement/)

Loving More Magazine

Online poly magazine with articles and information about upcoming poly events in the US.

Poly Families

An excellent site especially for people with questions about polyfidelity, living in community, and child-rearing.

Polyamory Society

More of a political poly site with mission statements and good links to other poly sites. If you’re interested in legal questions or in poly activism in the US this is a good site to start with.

The Polyamory Contract

An interesting example of one particular thought-out poly relationship ‘contract’.

What Psychology Professionals Should Know About Polyamory: The Lifestyles and Mental Health Concerns of Polyamorous Individuals.

This is a good article to give your therapist if they’re not poly-aware.

Franklin Veaux's Polyamory Page

A really good site with a mature sensible approach to poly issues and a lot of links to a lot of helpful information.

The Institute for 21st Century Relationships

By The Foundation of the National Coalition for Sexual Freedom. It takes a broader approach to some more general questions.

Understanding Opposition to Polyamory

Some general opinions on why there is such opposition to polyamory.

T-shirts

Some cute poly designs from the US. Get them asap if you want them; this product line is being deleted. And here are some more T-shirt designs...

Dating Sites

On any dating site, expect to get a lot of spammish sex solicitations (ignore them); expect to answer many reasonable inquiries before finding even one worth a date; expect many dates before one that clicks. You may do better just by widening your real-life social circles, especially in the direction of alternative-culture interests.

Poly Matchmaker

Possibly the biggest poly-dedicated dating site in the entire wooniberse, claiming about 6500 members. US-based of course, but what can you do? Maybe check out some Australian sites that are not actually poly-exclusive but do allow poly-friendly categories...I'll check this out and get back to you.

OK Cupid

A poly supportive dating site, with members worldwide.  This site has fun quizzes, useful (mostly automated) matching criteria and is used by many poly people in Australia.  To improve your matches with others, make sure that you answer as many questions about yourself as possible.