I just tried Source Naturals arcticpure krill oil. It's about the only brand that isn't sold out. It works, but it isn't nearly as potent as the neptune krill oil I tried before they had manufacturing problems.
I found out that the product actually contains fish oil and natural lemon oil as well:
Fish oil, medium chain triglycerides, gelatin, glycerin, mixed tocopherols, ascorbyl palmitate and natural lemon oil.
I now think the product is actually a mix between krill oil and fish oil and natural lemon oil. This explains it's reduced potency.
Also the product is encapsulated in hard gelatin (making it slow release?) so I had to wait 2-4 hours for the effect. Chewing the softgels made the product work quicker thought.
Now I will try superba krill oil (aker biomarine).