Society for the Preservation of Irish Soda Bread out there, and you should support them because it's a worthy cause -- seriously, could they have an awesomer idea? So bake some soda bread today! The basic recipe is pretty plain, and you can consider adding some currants to it -- only then you'll have to call it spotted dog or railway cake (depending on if you put eggs in there too). Complicated, eh? Who knew?
One thing that is important when baking is to put about 2/3 of your coals on top of the oven, and 1/3 underneath. This is because it is easier for heat to rise than it is for it to reach down into the pot. So pick a number of coals that you can divide by three (like 21 for a 10 inch pot). It's a good idea to start a few extra in the chimney too, since you'll want to leave a few behind so you can keep a reserve burning -- just add a few extra briquettes every now and then so you have replacements available when the ones on the bastible burn down.
Mix the dry ingredients, then make a well in the centre of the flour mix and pour in the buttermilk. Stretch out your fingers and stir your way from the middle to the edge of the mixing bowl. By the time you get to the edge, you should have a nice ball o' dough.
Bain taitneamh as do bhéil!