Hi Colin. Yes I agree it's a fine balance between not having a product and pretty much spamming and wanting to get out of the door with something that could be really valuable to a lot of people.
I've found that the service is really useful to those who wouldn't be able to test their ideas (not technical, not enough time etc) and I know a couple of projects that have come out of it so far that look really good. So have faith.
Mm that's a good point though, perhaps I could include something about it being suitable for 'lean startups'. Is that copyrighted I wonder?