Hey James,
A few things:
- Heavy use of text shadow and box shadow makes my browser chug to a halt. Latest Chrome build on a 2.53GHz Core 2 Duo with 8GB of RAM.
- Get rid of "What is splinch?" The paragraph there is enough, and there's no need to guide the user's eye to that.
- Header/logo are huge... I'd consider making that section 50% of it's current height.
- I'd get rid of social stuff for now: Your target audience is savvy enough to share in a smart way.
- I'd change the button text to [ Join our mailing list and get your first month free ] and make the color of the button distinct from your background color. Your button should be in the foreground, and using a similar palette as the background is visually confusing.
- The items at the bottom look more like a footer -- typically where you'd look for things like menu, about, etc.. -- and less like features/important information. I'd consider bringing them up into the lighter background so that they are visually grouped with the product
- I'd try a little bit of a different layout. Typically the top left of the screen is the most valuable real estate. I took a couple minutes and did this: http://cl.ly/3l0y1w2G2p2y1P2M1p3u
- The container is a bit weird.. Unfortunately chrome developer tools is super slow with all the text, so I'm not sure quite what's going on. What I would do is have a container with a fixed width (880px-960px) with a margin:0 auto; to center the entire page.
Great idea, and while I'm not your target audience, I think that a lot of people will get value out of what you're building.