It will definitely be a mine and probably not until 2016 by which time the nickel price will not be where it is today - it will almost certainly have a life of +10 years and a resource in the region of 10-15mt @ 3.5% Ni 1.5% Cu for around 500kt Ni and 200kt Cu + Co credits.
Grade is king here, it will be able to operate profitably when low grade disseminated and laterites are underwater.
Nova is a monster and they will probably still be drilling satellite deposits in 5 years time as the main body is being stoped. Go and look at a five story office block and think 5% Ni - this will be a relatively low cost underground operation after an initial pit.
Wait for the diamond assays of the massive and matrix they will show this isn't a low grade beast - I'd estimate massive/breccia running up to 8% with overall intersections of 4-5% Ni.
SIR Price at posting:
$1.41 Sentiment: ST Buy Disclosure: Held