I think the advice to cover it up with a plain matte skin is the best idea - trying to get the logo off just isn't going to work and you'll likely end up making a more distracting mess.
It's strange though, how what bothers one person, another doesn't even notice. I have both a graphite DX and K3 and I actually had to go and get them and take a look to remember exactly what the logo looked like on them! I really just never notice it. Maybe it's the black logo on the lighter coloured Kindles that show up more?
