diff --git a/Doc.md b/Doc.md
index ec2f9f5..b3f3f4d 100644
--- a/Doc.md
+++ b/Doc.md
@@ -25,8 +25,11 @@
  * [mutable.txt]source:docs/mutable.txt, explaining the interesting crypto tricks that go into secure distributed mutable files
  * [FileEncoding](FileEncoding), explaining how we turn files into shares, with verifiable hashes; This is mostly concerned with chunking and Merkle trees.
  * [ShareEncoding](ShareEncoding), explaining how we turn a chunk into shares: Reed-Solomon, FEC, that stuff
- * The PyCon2008 [design paper](http://allmydata.org/~warner/tahoe.html),
-   providing an overview of the Tahoe design.
+ * The [paper](http://allmydata.org/~warner/pycon-tahoe.html) presented at
+   [PyCon2008](http://us.pycon.org/2008/about/),
+   providing an overview of the Tahoe design, and the
+   [slides](http://allmydata.org/~warner/pycon-tahoe-slides.zip) (.zip) that
+   were used for the presentation.
 
 ## Outstanding Issues
  * [PeerSelection](PeerSelection), explaining how a Tahoe node chooses which other nodes to use for uploading and downloading files (which raises some unsolved issues in balancing scalability, robustness, performance, and simplicity)