This a very interesting topic twila. 4 years ago I decided to do my family genealogy, and it was one of the best experiences I have ever had.
I was able to get copies of my grandfathers records from the national archives in ottawa, which are sent for the price of photo copying and postage. It was sheer wonder to read and go through all the documents. These documents are available to anyone who had a relative in world war one. Encluded were even his pay stubs which was 15 dollars a month which he had sent to his mother.
He was wounded twice and all hospital records were included. One surprising item was the fact that he lied about his age, and was only 15 at the time he joined.
My grandfather died when I was 4, so I never really knew him, but to see his handwriting and his own physical description connected me to him in a deep and meaningful way.
I also did find my grandfathers relatives who lived in maine, she forwarded me pictures of my grandfather when he was a boy and when he was in the army and also pictures of his mother. The real gem was the 20 letters that my grandfather wrote his mother during the war, which she so kindly gave to me.
My mother was only 20 years old when he died, and she did not have any pictures of her father when he was young. I had the picture of himself @ 15 in his miltrary uniform blown up and framed. For christmas that year I gave my mother the picture and the letters. I do not have to tell you how it effected my mother, there are no words to describe the emotions that day.
One day the letters will come back to me and I will probally donate them to the national archives in ottawa.
I have alot of genealogy software and if anyone had an ancestor that was in world war one e-mail me and I can do a lookup for you.