It was previously called DemocracyTV Player and is an application to watch Internet TV,

If you follow the instruction from the Miro homepage you get a dependency problem under Gutsy, as it depends on an older package of libboost-python. You can also find the bug report here.

If you don’t want to wait for a new version for Gutsy you can just download the required library from feisty repository.

Unfortunately I do get the following error message when starting up Miro:
/var/lib/python-support/python2.5/dbus_bindings.py:1: DeprecationWarning: The dbus_bindings module is not public API and will go away soon.

Most uses of dbus_bindings are applications catching the exception
dbus.dbus_bindings.DBusException. You should use dbus.DBusException
instead (this is compatible with all dbus-python versions since 0.40.2).

Added:
With the latest gutsy package it is now working!