I have always been inspired by the two-man company known as CreatureBox... their artwork is fantastic, full of vibrant colour and life. They did the concept art for the Ratchet and Clank games. Here is a link to their site: http://creaturebox.com/
I have been trying out their style, using Sketchbook Pro for the lineart then importing over to Photoshop for the colouring. Here are two images I made, based on the previous Lombax designs I did in my last post. I'm hoping to try out more in this style!