Hi r00ted,
Nice job, I should run my check one of these days too, 31 march is quite far behind now and a HOSTS file needs a clean up from time to time.
I had a quick look and I don't have anything against removing dead ads and inoffensive sites to clean up the HOSTS file, but I did notice the presence of entries that are used by CWS and hijacks. As long as the site is listed and is owned by the same person I will not remove it, even if the hostname does not resolve to an IP. They use rotating techniques for their crap and next week or next month a site will become active again and peeps will get infected.
Kim