The Visio 2007 Viewer allows anyone to view Visio drawings and diagrams (created with Visio 5.0, 2000, 2002, 2003, or 2007) inside their Microsoft Internet Explorer version 5.0 or later Web browser.
Download: http://www.microsoft.com/downloads/details.aspx?familyid=d88e4542-b174-4198-ae31-6884e9edd524&displaylang=en
You can use this viewer inside a content editor web part by pasting the following into the Content Editor Source Editor.
<OBJECT classid="CLSID:279D6C9A-652E-4833-BEFC-312CA8887857"
codebase="http://www.microsoft.com/downloads/info.aspx?na=90&p=&SrcDisplayLang=en&SrcCategoryId=&SrcFamilyId=d88e4542-b174-4198-ae31-6884e9edd524&u=http%3a%2f%2fdownload.microsoft.com%2fdownload%2f6%2ff%2f5%2f6f569198-e7d0-49af-b162-54a11f38d301%2fvisioviewer.exe"
id="viewer1" width="100%" height="100">
<param name="BackColor" value="16777120">
<param name="AlertsEnabled" value="1">
<param name="ContextMenuEnabled" value="1">
<param name="GridVisible" value="0">
<param name="HighQualityRender" value="1">
<param name="PageColor" value="16777215">
<param name="PageVisible" value="1">
<param name="PropertyDialogEnabled" value="1">
<param name="ScrollbarsVisible" value="1">
<param name="ToolbarVisible" value="1">
<param name="SRC" value="http://www.wssdemo.com/Shared%20Documents/carpark.vsd">
<param name="CurrentPageIndex" value="0">
<param name="Zoom" value="-1">
</object>
The data in the diagram below is linked to a SharePoint List.