The NPR Great Voices page now says, "Thanks so much to everyone who nominated vocalists for 50 Great Voices! We're now tallying and analyzing the more than 3000 comments, the 3500 emails you sent, the 1200 posts to Facebook and the hundreds of tags on Twitter. To stay up to date on the series, and be notified when we open up voting on the final 50 sign up here for the Music Notes newsletter. Thanks again for all your recommendations and thoughts — your enthusiasm and passion has given us hundreds of singers from all over the world to consider."

There will be an opportunity to vote on the 50 finalists at this NPR link, as mentioned in the quote above. It involves registration with an email address and your chosen password.