The BBC has enlarged its pronunciation section adding more information, exercises and activities. There are over 60 new downloads including worksheets and audio examples. See for example the page on the schwa, with examples and exercises:
http://www.bbclearningenglish.com/multimedia/pron
http://www.bbc.co.uk/worldservice/learningenglish/multimedia/pron/schwa/index.shtml
http://www.bbc.co.uk/worldservice/learningenglish/multimedia/pron/downloads/pdf/exercises/schwa_exercises.pdf
