This meetup will be held after the NZ Skeptics 2010 Conference, and hopefully either Lynley or I will be able to tell you about the highlights! I'm hoping to have some video from the firewalking session ...

Once again I'm planning a short quiz, and your early clue is in the name and date of this meeting. Good luck!

For free, I'll tell you that it's nothing to do with the discovery of helium ...
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While observing the solar eclipse of August 18, 1868 at Guntur, in the State of Hyderabad, British India, Pierre Janssen noticed a bright yellow line with a wavelength of 587.49 nm in the spectrum of the chromosphere of the Sun. This was the first observation of this particular spectral line, and one possible source for it was an element not yet discovered on the earth. Janssen was at first ridiculed since no element had ever been detected in space before being found on Earth.
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We'll try the Robbie Burns as a venue for this ... I don't know the layout inside, so perhaps someone else will suggest a good place to grab tables ... ?