Okay! I'm going next week!
I've bought the following for the trip:
* Waterproof jacket (Gore Tex)
* Lightweight fleece
* Walking boots (Gore Tex)
* 65L main rucksack (main luggage) that came with a waterproof cover
* Camera bag which will act also as a daysack for carrying around each day (has a space for waterproofs too)
* Spare camera memory cards
* Spare camera battery
* Tripod
* Remote switch
* Thickish socks
* Eye mask
Missed anything?
Still need to sort out some cheap waterproof trousers I think. Let's just say that the walking boots I bought don't exactly look great with skinny jeans, which are what I wear every day! I walked for 45 minutes in my walking boots to break them in a bit and will get a couple of walks in this weekend too. Definitely taking some plasters with me, even though they're really comfortable.
Also need to buy Icelandic money beforehand and I'll probably do that a few days before I go. Certainly not at the airport as the rates aren't so good.
Anyway, lots more to write but I'm knackered so will add more on this in the next few days. Can't flipping wait to go! :D