Dye It 1. Start with a light-colored leather Smart Cover. 2. Brush over it with either a shot of espresso or a treatment of leather oil to darken the color. (There's a tutorial for the coffee-stained Smart Cover at Two Lives Left.) 3. Enjoy!
Laser Engrave It 1. Start with any Smart Cover. 2. Mail it in to a laser engraving company like MakeItUrz or In a Flash Laser (both will engrave your Smart Cover for $30-$40). 3. Choose any design, like text, icons or even images, to engrave. 4. Enjoy!
Emboss It 1. Start with a leather Smart Cover. 2. Buy a leather stamping kit, and follow the included instructions to emboss a design (like a monogram or small icon) onto your Smart Cover. 3. Enjoy! Alternatively, you can buy this vintage-look embossed leather cover from Etsy seller punkassjim:
(Images: Two Lives Left, user Section215 via MacRumors, MakeItUrz, In A Flash Laser via Flickr, Etsy seller punkassjim)