diff --git a/examples/datagram/README.md b/examples/datagram/README.md
index 68f40394964e2b2cf643fc4284c109797c37fb55..0a7585b1dd43bd0e7e846a3597f5ee32cf59e794 100644
--- a/examples/datagram/README.md
+++ b/examples/datagram/README.md
@@ -5,51 +5,27 @@ I'm using it to test out interfaces and conventions, and also to produce working
 
 For now it's going to be the simplest possible echo server/client.
 
-## Additions
+## New packages
 
-package p2phost
-type MsgHandler func(peer.ID, protocol.ID, []byte)
-type Host interface {
-  MsgMux() *msmux.MultigramMuxer
-  SetMsgHandler(protocol.ID, inet.MsgHandler)
-  SetMsgHandlerMatch(protocol.ID, func(string) bool, MsgHandler)
-  RemoveMsgHandler(protocol.ID)
-  WriteMsg(context.Context, peer.ID, ...protocol.ID, []byte)
-}
-
-package p2pswarm
-type MsgHandler func(peer.ID, []byte)
-func (s *Swarm) AddPacketTransport(p2ptransport.PacketTransport) {}
-func (s *Swarm) SetMsgHandler(MsgHandler) {}
-func (s *Swarm) MsgHandler() MsgHandler {}
-
-package p2piconn
-type PacketConn interface {}
-
-package p2pnet
-
-package p2pstream
-func NoOpMsgHandler(msg []byte, peeridOrConn) {}
-
-package p2ptransport
-
-package udptransport
+- [ ] go-multigram
+- [ ] go-multigram-select
+- [ ] go-libp2p-wireguard
+- [ ] go-udp-transport
 
-package manet
 
-## TODO
+## Affected packages
 
-- [ ] go-multiaddr-net datagram support
-- [ ] go-libp2p-transport datagram support
-- [ ] go-udp-transport
-- [ ] go-peerstream datagram support
-- [ ] go-libp2p-swarm datagram support
-- [ ] go-multigram
-- [ ] go-shs vs. go-dtls vs. go-cryptoauth
-- [ ] label-based switch
-- [ ] overlay routing interfaces
+- [x] go-multiaddr-net  (manet.PacketConn)
+- [ ] go-libp2p-transport  (tptiface.PacketTransport/Dialer/Conn)
+- [ ] go-libp2p-swarm  (sw.AddPacketTransport(), sw.SetPacketHandler(), sw.WritePacket())
+- [ ] go-libp2p-host  (hostiface.SetPacketHandler(), hostiface.WritePacket())
+- [ ] go-libp2p-net  (netiface.PacketHandler)
 
 
-## PR
+## About wireguard-go
 
-This PR adds APIs for message-based communication
+- Looks good, but way too tightly coupled
+- main.go, device.go
+- send.go, receive.go
+- device routines/queues and peer routines/queues
+- split up: packetconn, cli+uapi+tun+routing
diff --git a/examples/datagram/main.go b/examples/datagram/main.go
index 465ea95eccc79c137f5cbaac2ef7580a410f4c68..b2a56ab59d2403cfa5c07c4e5055ea2da1da81ee 100644
--- a/examples/datagram/main.go
+++ b/examples/datagram/main.go
@@ -16,7 +16,6 @@ func fatal(i interface{}) {
 	os.Exit(1)
 }
 
-// XXX unrewritten broken because jbenet/go-stream-muxer is out of date
 // TODO move to libp2p org: go-stream-muxer go-smux-multistream go-smux-spdystream go-smux-yamux
 // TODO multigram will live in BasicHost, for now it's only swarm
 
@@ -44,18 +43,17 @@ func main() {
 		fatal(err)
 	}
 
-	// Conn as argument, for WriteMsg()?
-	s.SetMsgHandler(func(msg []byte, p peer.ID) {
-		fmt.Printf("got message from %s: %s\n", p, string(msg))
+	s.SetPacketHandler(func(pkt *[]byte, p peer.ID) {
+		fmt.Printf("got message from %s: %s\n", p, pkt)
 
-		_, err = s.WriteMsg(msg, p)
+		_, err = s.WritePacket(pkt, p)
 		if err != nil {
 			fmt.Println(err)
 			return
 		}
 	})
 
-	s.WriteMsg("hey bob", QmBob)
+	// s.WritePacket("hey bob", QmBob)
 
 	// Wait forever
 	<-make(chan bool)