Yes, hi, I was diagnosed with stage 4 stomach cancer in May 07, when I was 38. I had a palliative total gastrectomy, followed by 6 rounds of chemo, and then 25 sessions of radiation. Today I'm waiting for results from the latest CT. The key I think is to fight, be positive, and stay busy with other things in your life, as much as possible.
Like your son I have young kids - aged 6, 4, and 1. They inspire me to beat this for them, for us.
If your son wants to be in touch with me directly I would be pleased, or any other way I can help. Stay strong.