Piwik v1.8 now respect the Do Not Track header, which is great. However it is enabled / disabled at a global level. When enabled, Piwik will respect Do Not Track across ALL sites.
It would be nice if we could control this per-site. By way of example, I use piwik to track my public website as for internal sites. It would be nice to respect Do Not Track on the public website but not on my internal sites. My “internal sites” are sites where people within my company have logged in.