Hi,
For iPad/iPhone users, Androïd tablet users and other computers all music from the Wikifonia library ( over 6000 songs in .mxl format) and all music from the Yahoo BIAB group (another 6000 songs in .mgu format) have been converted into 3 important formats by me.One is the standard PDF format usable on any platform! The second is .mxl ( compressed musicXML) which can be used with any notation program and with "Avid Scorch" (iPad app). Which means on the spot transposing your scores to any key is available on your iPad! Secondly you can import and edit all .mxl files with MuseScore the free notation program or any other notation program like Sibelius or Finale! The third format is .mscz which is the format for MuseScore which can be used for the "MuseScore Songbook". That means also Androïd users have optimum access to all files. The "MuseScore Songbook" is available on iPad and Androïd platforms, secondly the app soon will be available with a transpose function as well so also Androïd users will be happy! All files have been optimised in size for the iPad. All chords (as far as are available in the original songs) have been optimised to be transposable with the scores. All conversions were done via batch processing. Imo the results are pretty useful. The links to the different formats are available here:
https://www.sugarsync.com/pf/D7389688_4167795_9830380
Enjoy!

Musicians and music publishers are still wasting too much paper...come on men we live in the digitised age...Wake up!