Well organic is really a personal thing - we sort of do a bit of both. I think the key thing is that you keep the ingredients as pure and "real" as you can. Heating food reduces its "allergicness" so you may wish to consider introducing milk and egg in baking rather than straight. Also the egg yoke is not meant to be as allergic as the egg white so you could consider boiling an egg and starting with the yoke. Personally I'd probably do a little longer between intro's. Also start with a small amount eg:
day 1 = 1 teaspoon
day 2 = 2 teaspoons
day 3 = 4 teaspoons
His skin sounds good

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DS1 Feb 02; DS2 Oct 04; DS3 June 07
Food & environmental allergies, eczema,
anaphylaxis, hayfever, food chemical intolerance and asthma.
Treat the earth well: it was not given to you by your parents,
it was loaned to you by your children. ~ Ancient Indian Proverb