Thanks for the advice Staver. I had never messed with birch bark before i did this, I had in mind to leave the outer bark on the outside so it looked more like the tree, but i was amazed at what birch bark does when it gets wet and decided that i liked it inside out the best. If you get a piece of BB about the size that you think will work for a quiver, just put under some warm water in the shower, and it will rapidly curl up, then just take some clothes pins and get it to the shape you want and let it dry for a couple hours and it will hold its shape. At least thats how it worked for me, may be different with different speicies of birch.
Another thing that i found that i thought was really cool was, i had about a 5 inch by 8-10" piece of bark that was left over, that curled up into about a 2 inch diameter circle. It works perfect for an armgaurd, you just roll it around your arm and because it wants to stay curled it is pretty darn tight, dont need to tie it on or anything. I like it much better than any store bought armgaurd that ive had and its free.
Thanks again for the advice.