I put pasteurized egg whites in everything... 1/2 cup in my iced coffee every morning... 1/2 cup on my Kellogg's ProteinPlus cereal... Added to protein shakes...
They don't really add any taste. Makes the coffee kind of creamy.
As for the protein values of raw vs cooked, I recall reading somewhere just the opposite. Something about cooking breaking down the protein. Either way, for me, liquid whites are easy to incorporate into any meal.