I don't see your email in that cached page. We had to allow our content into Google's index to be able to use their custom search. The content on our site is still protected with a login so unless you have an account on DC, you won't be able to add content, but viewing can now be accomplished with cached content on Google if that's your desire.
As for obfucation of email addresses in post content. I'm leary of messing with the forum code in that way. If someone posted their email and wanted it posted then we would be doing the wrong thing. The real issue is that email addresses should not be present on the site unless the user specifically enters them. Let us know of those situations where that process is broken and we'll get it fixed.
-Joe
Cirrostratus