I linked to a screen shot in case it goes away...but you can see the "Heroku's new pricing" link at the bottom of the most recent blog post.
<a href="https://blog.heroku.com/archives/2013/2/21/better_queuing_metrics_with_updated_new_relic_add_on/" rel="nofollow">https://blog.heroku.com/archives/2013/2/21/better_queuing_me...</a>