Update readme

Author: coadler

README.md

@@ -4,8 +4,12 @@
 
 `wush` is a command line tool that lets you easily transfer files and open
 shells over a peer-to-peer wireguard connection. It's similar to
-[magic-wormhole](https://github.com/magic-wormhole/magic-wormhole) but doesn't
-require you to set up or trust a relay server for authentication.
+[magic-wormhole](https://github.com/magic-wormhole/magic-wormhole) but:
+
+1. No requirement to set up or trust a relay server for authentication.
+1. Powered by Wireguard for secure, fast, and reliable connections.
+1. Automatic peer-to-peer connections over UDP.
+1. Endless possibilities; rsync, ssh, etc.
 
 ## Basic Usage
 
@@ -53,6 +57,8 @@ servers, instead using x25519 keys to authenticate incoming connections. Auth
 keys generated by `wush receive` are separated into a couple parts:
 
 ```text
+112v1RyL5KPzsbMbhT7fkEGrcfpygxtnvwjR5kMLGxDHGeLTK1BvoPqsUcjo7xyMkFn46KLTdedKuPCG5trP84mz9kx
+
 +---------------------+------------------+---------------------------+----------------------------+
 | UDP Address (1-19B) | DERP Region (2B) |  Server Public Key (32B)  |  Sender Private Key (32B)  |
 +---------------------+------------------+---------------------------+----------------------------+
@@ -61,11 +67,12 @@ keys generated by `wush receive` are separated into a couple parts:
 ```
 
 Senders and receivers communicate over what we call an "overlay". An overlay
-runs over one of two currently implemented mediums; UDP or DERP. Each message is
-encrypted with the sender's private key.
+runs over one of two currently implemented mediums; UDP or DERP. Each message
+over the relay is encrypted with the sender's private key.
 
 **UDP**: The receiver creates a NAT holepunch to allow senders to connect
-directly. Wireguard nodes are exchanged peer-to-peer.
+directly. Wireguard nodes are exchanged peer-to-peer. This mode will only work
+if the receiver doesn't have hard NAT.
 
 **DERP**: The receiver connects to the closet DERP relay server. Wireguard nodes
 are exchanged through the relay.
@@ -74,3 +81,18 @@ In both cases auth is handled the same way. The receiver will only accept
 messages encrypted from the sender's private key, to the server's public key.
 
 ## Why create another file transfer tool?
+
+Lots of great file tranfer tools exist, but they all have some limitations:
+
+1. Slow speeds due to relay servers.
+1. Trusting a 3rd party server for authentication.
+1. Limited to only file transfers.
+
+We sought to utilize advancements in userspace networking brought about by
+Tailscale to create a tool that could solve all of these problems, and provide
+way more functionality.
+
+## Acknowledgements
+
+1. [Tailscale](https://tailscale.com)
+1. [Wireguard-go](https://github.com/WireGuard/wireguard-go)