Ok, the orientation video mentioned a few things of interest. Things like magnetic fields, phsychology, and what caught me off guard was the fact that this was the "swan" station... the station for studying the electromagnetic properties of that particular section of the island. This implies there are more "sections" of the island, and possibly more stations as well.
Think you might all enjoy this little website right here...
http://www.thehansofoundation.org/
This is the website of the "founder" of DHARMA... Alvar Hanso. His organization has some interesting projects...
-Life Extension
-Electromagnetic Research Initiative
-Quest For Extraterrestrial Intelligence
-Mathematical Forecasting Initiative
-Cryogenics Development Imperative
-Juxtapositional Eugenics Institute
-Accelerated Remote Viewing Training Facility
This website is obviously an official direct offshoot of Lost (as seen when you click on the "Terms of Use" link at the bottom of the homepage). These projects are all quite interesting, and I assume at least one of them explains the hatch and the island. However, I think some, such as "Quest For Extraterrestrial Intelligence" were added just to bait viewers subscribing to false theories, example being the alien abduction theory.
The one I'm most interested in, especially after tonight's episode, is the "Accelerated Remote Viewing Training Facility". Jack was so insistant that the execution of the numbers was an experiment in observation... that Desmond was being tested to see how long he would continue this process to show his
faith.
Faith is a big theme for this show, especially for Locke. At least once an episode Locke can be found making references to it, or telling members on the island directly to "have faith". Hell- in this episode alone, the concept of a Leap of Faith was presented at least twice. I personally can come up with no ideas as to what might happen if the numbers are not entered, or why they would need to be.
My theory is that entering these numbers is not futile, but has some sort of effect on the world off the island. Initially I thought that Desmond's entering of the numbers might cause the transmittance of the sequence over the radio... using the tower that was causing radio interference last season, and possibly the same transmission that brought Hurley to the Island. Now, i'm not so sure about that one... seems too direct for Lost. But I'm still convinced that Desmond is doing something by entering these numbers, but has been completely misinformed by DHARMA about his actions for a reason.
That's all I have for now, folks... but I'll be back. Have faith.
EDIT: I told you I'd be back. Just reviewed the Hanso site, to find this on Alvar Hanso's section:
Still running his vast network of companies, Hanso has set new standards for philanthropy and the support of pure scientific research for the betterment of the entire race.
This makes me feel almost 100% sure that Dharma or one of the companies in Hanso's "Vast Network" is using the island to observe and test humans.