I like the simple and clean layout of your site, but would really like to see a bit more either with screenshots or demo video.<p>Your description leaves lots of questions. You say it's an 'application and service', does that mean it requires a download?
Is it open to the public? or do you set-up groups, etc.<p>These are some of the questions I'd like to have answered before signing-up. At the moment, I'm not sure how I'd use the service.<p>I believe you've don a big 'no-no' with respect to including users e-mail addresses in the url. I gave you an e-mail address that I don't use, so don't care, but I'm pretty sure you don't want to do that, you should encode it with a secret key, or use user-id's.<p>Now that i've signed in, I have absolutely no idea what to do. How do I create a new entry? How do I invite people?
Can I only have one 'main' page and I have to edit that?<p>I can't say I have a real need for a product like this, but my gut instinct tells me that if I did have a need, I would want to create and share multiple documents with different people.<p>What are you doing that I can't do with shared documents on services like Google Docs?