LaunchRock was a big hit when it launched, years and year ago. It was one of the first website builders that just gave you a "Coming soon" page and nothing else. Unfortunately it never grew beyond that phase, and even with the rock-bottom pricing ($5/month premium plan) it still offers too little in today's competitive world.
There are only 8 templates to pick from, and even those are very basic and have too little meat on them. Besides from a form to collect emails there's not much more that Launchrock has to offer. I still see it in use here and there, especially on the free plan, so if all you want is a couple of paragraphs of text and a signup form give it a try.