Looks good! I would think about replacing your main tagline with that sentence, or something like it. Not to be overly harsh, but your main tagline doesn't say anything.
Edit: Actually, I think if you said something like "Sandstorm is an open source app platform for personal servers" that would be a major improvement. The whole "app" part is missing from the main tagline. Then, your sub-tagline goes into more detail about what apps.
Edit 2: Actually, I would remove the open source part altogether. It's redundant if you have a github link somewhere on your page, which you do, and I think the developer community you are targeting would assume that it's open source. Or, just keep "open".
Actually, the words "open source" are a recent addition to our header, whereas we've always had the github link. We discovered from feedback that many people who visited our page had no idea that it was open source, since most people don't look at nav bars, and this of course completely changed their perception of the project (for the worse, obviously). When we put "open source" into the header, we saw a marked increase in interest.
Thanks for the feedback, though! We'll think about inserting "app" in there.
