Something that I noticed with sheet music publishers is that you get a 50/50 chance of getting a really good and proper transcription; Hal Leonard and Musicnotes.com are notorious for this. However, HL does publish "Band Books" (I forgot what they're really called) that actually have very accurate transcriptions for all the instruments in a particular song. They usually sell the books as a collection of songs from a certain artist, and I've only so far came across the Band Book for the Beatles. I doubt they'll do this for Coldplay, and it's really a shame since theses books are damn accurate. Musicnotes.com has some very good piano music if you can find a "piano solo" transcription for your song. Again, they only have a handful of Coldplay songs.
Then both Coldplero and me will be able to easily download it.
