Hushmail is NOT secure or private [1] . The sentence "even an employee with access to their servers can’t get the actual data of the email" is false. Do not use.
Edit: Adblock Plus allows certain "acceptable ads" (read: companies pay Adblock Plus to get whitelisted) and this feature is turn on by default. Use the fork Adblock Edge [2]
There's a lot of "misinformation" in this post. I wouldn't recommend three of the four "tools" mentioned and would recommend Tor only after ensuring that the user has a clear understanding of its strengths and weaknesses.
I guess you can't expect excellent quality for $30 an article, though (and "advertisement" might be a more appropriate term).
Edit: Adblock Plus allows certain "acceptable ads" (read: companies pay Adblock Plus to get whitelisted) and this feature is turn on by default. Use the fork Adblock Edge [2]
[1] http://www.wired.com/threatlevel/2007/11/encrypted-e-mai/
[2] https://addons.mozilla.org/en-US/firefox/addon/adblock-edge/