Hi everyone - New Relic is here at DrupalCon and we've had a ton of conversations with folks here about drupal performance and visibility into Drupal's behavior. Dries' even mentioned it as a core pillar moving forward at his keynote. We're focused on performance and want to make sure we open up the ability for anyone in the Drupal community to sign up for our free month program. Sign up here: https://rpm.newrelic.com/signup/18 and enter the promo code "DRUPALCON" . For more information, read Dries' blog post. http://buytaert.net/playing-with-new-relic-on-acquia-hosting
If you are an Acquia hosting customer, you get our Bronze offering for free. Email me at Patrick @ newrelic for details on setting that up.

Comments
Module
There is also a companion module here:
http://drupal.org/project/new_relic_rpm
I would suggest folks to consider using this module. It's especially useful for things like marking certain tasks as "background" so they more accurately represent your environment.