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Thanks to everyone who emailed me with info and suggestions for soy sauce substitutes. Here's the result: 

1] Bragg's amino acids [made from soybeans]

2] LaChoy soy sauce

3] San-J Organic Tamari

4] Sanchi Tamari

Substitutions: 

1] sesame oil

2] worchestershire sauce

3] fish sauce

4] curry, hot pepper, ginger and garlic

And two soy-free recipes I found on the internet:

Soy sauce substitute #1

2 T CF Beef Bouillon
2 t Red Wine Vinegar
1 t Molasses
1/8 t Ground Ginger
ds Black Pepper
ds Garlic Powder
3/4 c Water

In small sauce pan, combine and boil gently uncovered about 5 minutes or til mixture is reduced to 1/2 cup. Store in refrigerator. Stir before using. Yield: 8 Servings

Soy sauce substitute #2

4 T CF Beef Bouillon
4 T Cider Vinegar
1 t Molasses
1 1/2 c Water,Boiling
1/8 t Black Pepper
1 T Sesame Oil

Combine ingredients, stirring to blend thoroughly. Pour into jars. Cover and seal tightly. May be kept refrigerated indefinitely. Yield: 32 Servings

Thanks again, 

Sophie :o)

*Please provide references to back up claims of a product being GF or not GF*