In this post you will find some of the best links I've found to download Bar files to your playbook:
http://limetrip.blogspot.com.es/
http://www.mediafire.com/?qv7odxcxt28s7#0,1
http://playbookbars.com/
http://goodereader.com/apps/playbook/playbook-android-apps/
http://www.filearchivehaven.com/2011/11/30/some-flash-games-for-fun/
http://www.mediafire.com/?cc2h5fjkc8ck7
http://playbookworld.webs.com/
http://bomberhero.wordpress.com/2012/05/26/special-instructions-for-playbook-appsgames/
These links are not in order of quality.... they may vary.