Have you actually watched this show???

Check the post counts.
To clarify, that was sarcasm. Very few things on this show are as they seem.I don't believe Kelvin is dead--it's too simple and there's been no evidence of him found. I think he's Dharma.
Here's what I think is happening:
- Dharma runs experiments on people, animals and nature
- Danielle and Desmond's ship wrecks were assisted by trained ocean animals. Remember we saw the shark...what other creatures have been worked with?
- Kelvin knew Desmond would be crashing. He came running out of the woods a few minutes later and told Desmond to run
- Kelvin told Desmond about the numbers, showed him the ropes and warned him about the island. He probably said something like "if you stay out there too long, the disease (or incident) will tear you apart"
- With the seed firmly planted, Kelvin took off on some kind of dangerous mission to get food, etc
- Kelvin never returned
- Kelvin had gained Desmond's trust, so Desmond assumed "it" got Kelvin and is scared sh-tless of "it"
- Desmond thinks he knows of someplace safe and took off to get there after the computer was destroyed. This is where Desmond is now.
- At some point in the future, the survivors will find Desmond holed up in another bunker
- The survivors will also find (may have found?) Kelvin