Hey Fuzzy Logic, (interesting name for someone discussing creativity)
Haven't you hit the "originality" wall that all people who undertake creative endevours eventually run smack into? I am a musician and feel the same way about music. Really hasn't been anything "original" in rock-n-roll since Elvis and Chuck Berry ripped and warped the styles of Ray Charles, Little Richard, and the whole 40's-50's R&B sound. Still doesn't stop people from putting out good music, no matter how un-original it is in the bottom line.
Look at the discussion here on "ripping" XP-style Dashboard skins, and how close the skins can be and still be "different". Neither is in any way "original" (no matter what the authors may say, they still come from the XP nest), just variations on a theme. Nothing wrong with that, Bach made his living doing variations on his musical style, his 5,000th work was not nearly as "original" as his first, but proves originality is not the only characteristic of a creative piece of effort.
That is the long version of me telling you to not worry about originality, keep skinnin', the world needs more creative people.