Is omega-3 really that good for you? All the current crop of TV ads for yoghurts now all come 'with omega-3' but I want to know is whether omega-3 is really that good for you or not?

See, I read that research has shown that omega-3 fatty acids may reduce the risk of coronary heart disease, but that this is not conclusive research/evidence.

Yet, said health risks (again inconclusive) to taking omega-3 are that it can cause bleeding should too much be consumed, it increases the risk of hemorrhagic stroke, increased cholesterol and reduced glycemic control among diabetics, the suppression of immune and inflammation responses.

So, which is right? And if there's no conclusive proof of what it does; should it be in mainstream products?

Summarized question: Where can I find more information on the benefits and risks of omega-3?