Hi,

I am wanting to develop a question and answers based site for people
of New Zealand.
To start with, I am not planning on targeting a specific niche, it's
for people with questions about anything.

A person is able to ask a question and set a maximum price, then
people who want to answer the question can submit a proposal (bid) on
how they will answer the question. The person can then select the
proposal that appeals to them the most, their account is charged a
small fee and the two parties are left to finish the transaction
offsite (by email, phone, personal meeting or whatever they choose).

I can think of ways to advertise to people who would answer questions
on the site, because they would be gaining money for their services.

I am having trouble coming up with a successful marketing campaign to
entice people to ask questions on the site.

I would like a list of keywords I could use to market this site effectively. 
And at least 3 other specific marketing strategies I could use to get
people to come and ask questions.

I am familiar with basic advertising principles, I have advertised
other sites in the past. I am looking for something specific to
targeting people who want to ask questions and are likely to pay for
the answer.

I would expect to be able to use the answer you provide to run tests
to see if this is a viable market for New Zealand by way of a Pay per
click campaign to get people to a temporary page telling them about
the site and that it is under development.

Thanks, please let me know if I need to clarify anything.

You are asking the almost impossible, by asking for a list of keywords
that would generate interest in a site that has no real niche except
being from New zealand.

I would try and be a bit more specific with a list, probably targeting
the fact that the site is in New Zealand? My site
http://www.keywords-cp.com has heaps of helpful stuff including a
great article on getting the write keywords.

Have a look and I hope it is helpful. If I was one of the Google
experts here I could probably makeup a list for you LOL