Is there a way to use piwik with tumblr? It seems it is not possible to upload the files there.
You will need to host Piwik (but you can get it cheap–like 4$ a month[/url]). To add the code to Tumblr is very easy. Details on adding code is explained in this [url=http://www.statstory.com/install-piwik-or-any-analytics-to-your-tumblr-blog/]blog post.