Using the is_in_stock field, I'd expect the stock status to translate 0 to Out of Stock and 1 to In Stock.
This doesn't seem to currently work in this way. Using the Magento 1.6.2 and latest Magmi.
Just been looking through the magmi_productimportengine.php code and can see that is_in_stock seems to be worked out based on whether the qty available is more than the min_qty. I think it would be good to be able to overwrite this based on the "is_in_stock" column.
You seem to have CSS turned off.
Please don't fill out this field.
I've commented out
if(!$is_in_stock && $item["qty"]>$mqty)
on lines 805-808 in engines/magmi_productimportengine.php, because I needed this as well.
It should work for me as I don't need the relative quantity.