diff --git a/RelatedProjects.md b/RelatedProjects.md
index 04c4785..08fc6db 100644
--- a/RelatedProjects.md
+++ b/RelatedProjects.md
@@ -20,6 +20,7 @@ There are several projects to extend Tahoe-LAFS or integrate it with other tools
  * [RubyTahoe](http://github.com/soult/rubytahoe/) -- David Triendl's fork of Ian's ruby client library with extended features.
  * [RubyTahoe](http://github.com/trel/rubytahoe/) -- Terrell Russell's fork of David's fork of Ian's ruby client library, now with fewer warnings! 
  * [canopy](http://github.com/thraxil/canopy) -- A Django frontend to Tahoe-LAFS
+ * [pyfilesystem](http://code.google.com/p/pyfilesystem/) has a Tahoe-LAFS backend now thanks to slush
 
 # Tips and Tricks