For more gluten free recipes of all sorts (not just cakes) have a look at my facebook group:
The Gluten Free Group:
Its open to everyone and has a whole range of recipes, tips, restaurant lists etc contributed to by members - although the recipes are mostly mine and 'Aunty Karlas'...(who invented the most fabulous word "bakexperimenting" to describe what we do)
Of course, the more people who join the group the better, since we can all share recipes and local knowledge about restaurants and cafes catering for gluten free diets.
One day we really will have to write that cookbook we keep talking about....