IIRC, HSOTD was made based off popular zombie franchises. It even has references of popular zombie movies in the anime itself. That's why it seems cliche'd and such. It's probably still the most popular anime... this entire year.
And, yes, I'm watching literally everything thats currently airing. Just a few ONA/OVA's i'm not bothering with. Dropped a few animes already. Only ones I haven't bothered with is Basara 2 (since I haven't finished 1) and CatShitOne.
Paul's Anime List - MyAnimeList.net
Not perfectly up to date but it should be close enough.
Still waiting for the Moe Zombie Anime
and a few others for Fall 2010 season.