Despondency's "Supreme Misanthropic Brutality" teaser EP is pretty damn excellent, in my opinion. A tad more brutal and perhaps slightly less catchy than "God On Acid", but great nonetheleess. They just signed to Brutal Bands, and a new full length will be out early 2008. I doubt they'll be able to top "God On Acid" (which is one of my alltime favourite DM releases), but the EP was really promising.
I'm also looking forward to Abominable Putridity's debut full length - I've been listening to their Myspace tracks on a daily basis for ages now.
Other noteworthy slam death releases from 2007 include the Crepitation/Kastrated/Ingested "North-West Slam Fest" split, Infernal Revulsion's "Devastated Under Hallucination", Human Rejection's "Torture Of Decimation" and the Embludgeoned/Human Filleted split.