Hello,
Boma is on the ground floor of the AKL, directly across from Jiko, to the left as you exit the doors towards the pool. Boma is an all you care to eat buffet, serving food from different pods, rather than a long standard buffet line. The sections include a meat and carving section, with different sauces; a kids pod with standard kids fare; a veggies pod; a salads pod; a soups pod; and a fantastic dessert pod. The selections are not what you would find at a standard buffet, with the xception of the kids pod. You can check sites like Debs WDWIG for menu selections. Off the top of my head, some choices I've seen are potatoes with Afritude, chicken pepperpot soup, ginger-tomato soup, banana wrapped fish, zebra domes, etc.
We have eaten there six times now since it opened, and have enjoyed it every time. We also ate breakfast there once, but since we're not really big breakfast eaters, did not feel it was worth it for us. The dinner is around 21$, while breakfast is around $15.
Hope that helps,
Take care,
Bill