Dry testing at its best. 1) Landing page with email capture + vague promise of something cool 2) ??? 3) Profit! I wouldn't be surprised if they don't have a product yet and are still figuring things out... EDIT: Just realised I am a hypocrite... http://littlecosm.com (I assure you that there is a product behind this, though!)
Still feels a bit "icky" to me, but then I like the act of building stuff itself.