Is there a place to sign up for e-mail notification of new VI3 patches?
They do have RSS feeds on this web site.
http://vmware.simplefeed.net/subscription
These will pick up the releases, but usually a couple of days after.
You can also go to the below link and manage your subscriptions, I received an email like below last week...
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Subject: ESX Server 2.0.2 / 2.1.3 / 2.5.3 / 2.5.4 / 3.0.0 / 3.0.1 - New Patch Available
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This communication is regarding the newly available patches for ESX Server 2.0.2, ESX Server 2.1.3, ESX Server 2.5.3, ESX Server 2.5.4, ESX Server 3.0.0 and ESX Server 3.0.1.
To manage your VMware subscription, please visit VMware Subscriptions.