Week 17 voting link
To vote this week, you need to be a member of therealljidol community. If you have never joined a community before, it's easy. Just click on the above link and then scroll up to the banner at the top of the page. You'll see a link that says "join community." Click on the link and then it will take you to a confirmation page to join the community, plus (I think) a separate confirmation page to add the community to your Friends page (that part is optional). After you've joined, you'll need to click on the voting link again, and it should allow you to vote.
I should add that this week, five people are going home from each tribe, and the voting is really tight. Every vote counts!