Anime site onepiecehq.com redirects to Zango:
However, if you cancel and then go back to the site, the Zango install magically disappears. This means that claim that you get site access for free by installing Zango is a crock (video).
Another site, userbars.org, also redirects to Zango. However, unlike onepiecehq, you apparently must install Zango to use the site.
Incidentally, there are these two Zango sites floating around, but they appear dead:
(Thanks, Shane E!)