You might want to add startingpage.com to search engines, Google are making life hard for the guys at scroogle, again. Also startingpage let's you use a proxy to connect to search results.
With regard to VPNs, you do get what you pay for. Whilst free is good, some might be inclined to pay for such services. Unfortunately, not all VPN providers are created equal. For a good starting point, I'd recommend reading through Which VPN Providers Really Take Anonymity Seriously?
Whatever you do, don't use a VPN service hosted in the United States.
What about adding other services such as Tor or even installing something like Privoxy
or a paid service like JonDonym
They have quite a good privacy check at http://ip-check.info/?lang=en
For addons/extensios, some might like Ghostery
There's also RequestPolicy
for firefox. You also need to mention flash/Silverlight cookies and DOM storage in one of your articles.
Other than that, useful article