You can register for an account at https://app.docbloc.co/register
Docbloc has free and paid plans, as well as enterprise support. Please see our pricing page to find out more.
You can reports bugs and make suggestions using the forms on our support page, we aim to respond to all bug reports within 48 hours and all feature requests within 30 days.
We are currently building out public api's that developers will be able to signup for, and while its not possible to contribute to the app itself we welcome any integrations with 3rd party systems and services, see our documentation section for more.
If you're seeing this then it's been released.