http://slidescreenhome.com/
Market location:
Just starting to play with it now. I'll post a full review shortly.
Very polished.
EDIT: OK so it is what it is. The free app has an advertisement on the bottom of your homescreen all the time which is a huge no-no for me. I don't mind this in an app that's free and running some of the time, but to always have advertisements on the homescreen is just bad form.
I think the idea is for a power user who gets a very large amount of emails/texts/mms/phonecalls a day. It seems to lay out these services as a primary function and they consume half the screen while idle.
Basically this is an informational powerhouse, but lacks any real customizability. I'd probably be more interested in it if it were a stand alone app rather than a home screen replacement.
I uninstalled/deleted it.