diff --git a/doc/plugins/googlecalendar.mdwn b/doc/plugins/googlecalendar.mdwn
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+[[template id=plugin name=linkmap included=1 author="Joey Hess"]]
+[[tag type/special-purpose]]
+
+This plugin allows embedding a google calendar iframe in the wiki.
+Normally, if the [[htmlscrubber]] is enabled, such iframes are scrubbed out
+of the wiki content since they're not very safe if created by malicious
+users. But some iframes are legitimate, and safe, if you trust the embedded
+content. This plugin is an example of how to deal with this in ikiwiki.
+
+Example use:
+
+	\[[googlecalendar html="""
+	<iframe src="http://www.google.com/calendar/embed?src=adkrdken8mupngh13jshlbenoc%40group.calendar.google.com&title=OSEL%20Calendar&chrome=NAVIGATION&bgcolor=%2371d873&height=588" style=" border-width:0 " width="480" frameborder="0"	height="588"></iframe>
+	"""]]
+
+The iframe should be the one provided by google. Note that it's used in a
+way that avoids cross-site scripting attacks, assuming you trust google's
+content.