Our hosting company just told us to remove this plugin (Version 1.2.3) within 48 hours or we would loose our account because Google reported that using this plugin was considered phishing malware.
Here is what they told us:
Your account was reported to us by Google for malicious content. We ran a search on your account for the content that was reported and found that you are running the Stout Google Calendar plugin (http://wordpress.org/extend/plugins/stout-google-calendar/) in your WordPress installations in the following locations:
Google is reporting sites that use this plugin to us as being phishing sites (phishing : the practice of using fraudulent e-mails and/or copies of legitimate websites to extract data from site visitors for purposes of identity theft) because the plugin asks for your site visitors' Google login. Since the login information is processed in your stillwaterareacommunitycenter.org's account and not directly on a Google server, this technically constitutes phishing.
So you may want to stay away from this plugin until this issue is resolved.