Well, I doubt you want to go through anonymzer.com or another "proxy" type website because then you are at the mercy of how these Websites choose to work at a given time. For example, I believe anonymizer only gives you so many page views and then prompts you to login or pay or something (not real sure here) the point being that you don't want to have your Website dependant on somebody elses that can and will change stuff without descretion.
Really, JavaScript or writing your own redirect script would be a more rock-solid approach.
UPDATE: on second thought, a javascript redirect is probably your best bet as a redirect may incite your browser to send referrer information again you can test this with the tool I mentioned.