I would've liked testing this, if the signup prompts weren't so... aggressively displayed ? I almost never do signups, especially social signups via GitHub/Twitter/etc anymore for beta products because it's happened in the past that they ended up semi-abandoned with no way of deleting my profile/account, as well as for other reasons.

The alternative is of course, signing up with a temp email address and data, but it makes me feel uneasy going this route.

I suggest considering to make hyperdev.com/about the homepage instead (perhaps that's already the plan, once out of beta) or adding a link to it from the current homepage. People can read a bit about the product first, before deciding to signup, it seems more honest and empowering.

At least maybe display prominently on the homepage that this is a FogCreek product, I think it would make it easier for users to trust.

Try imagining a homepage visit is your first encounter with the product, having known nothing about it previously. It asks for your data, but it doesn't even tell you who made it. You have N other sites to visit or work to tend to.