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+\begin{frame}[label=after-basics]{Mercurial is Extensible}
+  You can add new functionality to Mercurial:
+  \begin{itemize}
+  \item ships with 30+ extensions
+  \item wiki lists 75+ extensions
+  \item extensions can change basically everything
+  \item helps to keep the core small and focused
+  \end{itemize}
+
+  % \begin{itemize}
+  % \item \ext{bugzilla} integrates with Bugzilla
+  % \item \ext{color} enables  color output in terminals
+  % \item \ext{gpg} manages GnuPG digital signatures
+  % \item \ext{inotify} gives instant file status on Linux 2.6
+  % \item \ext{keyword} expands keywords in working copy
+  % \item \ext{parentrevspec} changes syntax for revisions
+  % \end{itemize}
+\end{frame}