Which of all the Hawaiian Islands are least likely to erupt?  Which are most?

Kilauea, on the "Big Island" of Hawaii, is said to be the world's most
active volcano. The volcanos on Oahu have not erupted for millions of
years.

These links may be of interest:

http://www.soest.hawaii.edu/GG/HCV/haw_formation.html

http://www.soest.hawaii.edu/GG/ASK/oahu-eruptions.html

The reason the western Hawaiian volcanoes don't erupt is because they
aren't connected anymore. There is essentially one (or a small and
very close group) of vent(s) that the Pacific plate is moving westward
over. The vent is in the same place but the islands move off and wear
away. As they aren't plumbed in anymore, they can't erupt.

I had no idea.  Does this mean Kilauea will soon no longer be
erupting?  (in geological time, I mean)

As others have commented, the Hawaii-Emperor seamount chain is thought
to have been formed by the motion over time of the Pacific tectonic
plate over a relatively fixed "hotspot" of upwellling magma.  The
oldest islands, which are now extinct volcanos, are those at the
northwest end of the chain, while the youngest, are at the southeast
end of the chain.  Currently, the hotspot is under the Big Island,
which is composed of 5 separate volcanos:  Kilauea, Mauna Loa, Mauna
Kea, Hualalai, and Kohala.  Kilauea, on the southeast side is the
youngest and most active of the volvanic centers that are above water.
 The youngest volcano in the chain, Lo'ihi is actually still
underwater.  It lies to the southeast of Kilauea, and should emerge
about the water in several hundred thousand years.

I will second pinkfreud's suggestion to check out the Univ of Hawaii's
excellent webpages at:
http://www.soest.hawaii.edu/GG/HCV/haw_formation.html and
http://www.soest.hawaii.edu/GG/HCV/haw_activity.html.


A good map of the Hawaiian chain is at http://geopubs.wr.usgs.gov/i-map/i2809/