I think it's great to see Nginx and MySQL stats in Longview. Could I add a feature request to have Longview report on Varnish stats? That would be huge, especially since it would be serving the same purpose as Nginx, decreasing system resources, and making your server resources more available to other Linodes. You could reuse the existing nginx UI reports, and varnishlog is extremely verbose with fast queries. I would really like to see how my site is doing in a graphical, friendly way like Longview