Pad out the standard XMPP stanzas a bit so they're at least useful.

client.go

@@ -23,6 +23,7 @@ func main() {
 	}
 	log.Printf("Connection established for %s\n", x.JID)
 	x.Send(xmpp.Presence{})
+	x.Send(xmpp.Message{To: "carol@localhost", Body: "Hello!"})
 
 	select {}
 }

src/xmpp/stanza.go

@@ -7,6 +7,8 @@ type Iq struct {
 	XMLName xml.Name `xml:"iq"`
 	Id string `xml:"id,attr"`
 	Type string `xml:"type,attr"`
+	To string `xml:"to,attr,omitempty"`
+	From string `xml:"from,attr,omitempty"`
 	Payload string `xml:",innerxml"`
 }
 
@@ -30,9 +32,19 @@ func (iq *Iq) PayloadDecode(v interface{}) error {
 // XMPP <message/> stanza.
 type Message struct {
 	XMLName xml.Name `xml:"message"`
+	Id string `xml:"id,attr,omitempty"`
+	Type string `xml:"type,attr,omitempty"`
+	To string `xml:"to,attr,omitempty"`
+	From string `xml:"from,attr,omitempty"`
+	Subject string `xml:"subject,omitempty"`
+	Body string `xml:"body,omitempty"`
 }
 
 // XMPP <presence/> stanza.
 type Presence struct {
 	XMLName xml.Name `xml:"presence"`
+	Id string `xml:"id,attr,omitempty"`
+	Type string `xml:"type,attr,omitempty"`
+	To string `xml:"to,attr,omitempty"`
+	From string `xml:"from,attr,omitempty"`
 }