No, this is correct. ZideStore implements required parts of the
Exchange 2000 WebDAV API to allow access to the OGo database from
Evolution (with the Ximian Connector).
<br />
<i>Update 2004-05-14:</i> Novell Ximian now released the Exchange Connector
as free (GPL) software! Due to this we are probably going to see a free
and completely operable OpenGroupware.org connector for Evolution soon.
<br />
In the moment this does not resolve the issue that ZideStore only 
works with Ximian Connector 1.2 and that the new 1.4 version is not supported.
Yet having the source available open incompatibility issue are now much easier
to resolve.
<br />
<i>Update 2003-08:</i> OGo got an email from the Evolution project manager:
"We would love to see native OpenGroupware plugins for Evolution being
written." :-)
<br />
The OGo related connector development is hosted in the
<a href="http://www.opengroupware.org/en/projects/evolution/index.html"
  >OGo Evolution Connector Project</a>.
Feel free to join the subproject!