You might want to try using a good wood stain instead of black paint to give it a more finished and professional look. At least, that is the route I would go. Otherwise not bad...although your KF looks pretty dusty.
Something I thought of while looking at the pictures was the idea of using a tight hinge on the back wood part to allow you to adjust the angles. You could also mount some small but nice speakers on the back base behind the kindle to plug into it and give it some extra volume. You could, possibly, even hollow our a couple of speaker holes to drop them into the base as well. Lots of neat ideas are coming to me as I write this!
Network: Family Mobile (T-Mobile)
Current Devices:Galaxy Note 8.0 , Galaxy Nexus GSM/HSPA+, Kindle Touch
Other/Family Devices: Samsung Galaxy S II, iPhone 3GS, iPad 2
Previous Phones: Evo 3D, Epic 4G, , Evo 4G, Samsung Vibrant, Samsung Intercept, T-Mo G1
Previous Tablets:Galaxy Note 10.1, Nexus 7, Galaxy Tab 8.9, Kindle Fire, Dell Streak 7, Asus Transformer, iPad, Archos 101, Nook Color and aPad