yea, when you blend them they oxidize and become less bio-available. I sometimes make raw egg smoothies with fruit and un-pasteurized butter. I blend everything with just the whites and then at the very end, I throw the yolks in for just two seconds or so-the yolks are the most important part.
Raw eggs are definitely more digestable than cooked. I have heard of developing a possible biotin deficiency from eating too many raw egg whites, but I really know next to nothing about it or even what biotin is. That's the truth.
If you eat sustainably farmed, organic or better raw eggs, the chances of finding one with salmonella is like 1 in 30,000 or something like that-I cited that on a research paper I wrote. But even if you come into contact with salmonella-that is not what get's you sick, what get's you sick is your body's inability to handle it. The problem is always your weakness, not the strength of the environment you live in. We all come into contact with salmonella all the time. Most of us don't get sick because most of us have already developed immunity from years of handling raw meat, getting licked by our dogs, horsing around outside...etc.