Getting started:
http://merb.devjavu.com/wiki/CreatingMerbProject
http://jit.nuance9.com/2007/11/merb-datamapper-getting-rolling.html
http://www.jaikoo.com/2007/10/28/datamapper-with-merb

Generators:
http://hassox.blogspot.com/2007/11/merb-generators-now-read-your-mind.html
http://drnicwilliams.com/2007/11/05/merb-04-installing-edge-merb-and-using-new-generators/

Misc:
http://www.mikeperham.com/2007/10/02/file-uploads-in-merb-versus-rails/
http://yehudakatz.com/2007/11/06/merb-04-the-one-that-rocks/

Heres a good one on merbs routing:
http://www.mr-eel.com/archives/106

Screencast:
http://www.vimeo.com/372998

Steps for merb on windows:
http://www.ghostonthird.com/2007/11/17/merb-on-windows-it-works/

Plugins:
http://yehudakatz.com/2007/09/19/merb-plugins-oh-yeah-theyre-pretty-frickin-cool-too/

Mailers:
http://yehudakatz.com/2007/09/03/merbs-mailer-is-awesome-if-i-do-say-so-myself/

Merb crud controller:
http://pastie.caboo.se/114896

File Uploads:
http://www.scribelabs.com/2007/10/18/file-uploads-via-merb-inside-a-rails-application-part-1-of-3/
http://www.scribelabs.com/2007/10/25/file-uploads-via-merb-inside-a-rails-application-part-2-of-3/
http://www.scribelabs.com/2007/11/13/file-uploads-via-merb-inside-a-rails-application-part-3-of-3/