enable phing to send desktop notifications via notify-send
Copy the php file to whereever you need it.
Declare it in your build.xml, with either:
<taskdef name="notifysend" classname="phing.tasks.ext.NotifySendTask"/>
or
<taskdef name="notifysend" classname="tasks.NotifySendTask"/>
Depending on where you've put the file.
At it's very simplest, use it like this:
<notifysend title='Deploy Script' msg='Database migrated' />
An icon can be specified, if you wish.