Update zebrad docs and README.
-//! Zebrad
+//! Hello! I am Zebra, an ongoing Rust implementation of a Zcash node.
//!
-//! Application based on the [Abscissa] framework.
+//! Zebra is a work in progress. It is developed as a collection of `zebra-*`
+//! libraries implementing the different components of a Zcash node (networking,
+//! chain structures, consensus rules, etc), and a `zebrad` binary which uses them.
//!
-//! [Abscissa]: https://github.com/iqlusioninc/abscissa
+//! Most of our work so far has gone into `zebra-network`, building a new
+//! networking stack for Zcash, and `zebra-chain`, building foundational data
+//! structures.
+//!
+//! [Rendered docs from the `main` branch](https://doc.zebra.zfnd.org).
+//!
+//! [Join us on Discord](https://discord.gg/na6QZNd).
//#![deny(warnings, missing_docs, trivial_casts, unused_qualifications)]
#![forbid(unsafe_code)]
