i think it's definitely a na'at/istighatha. soneya means beautiful and here it is referring to rasulAllah sallAllahu 'alaihi wasallam.
i was watching a programme whereby the public ring inn and recite na'ats. The following kalaam was read and the host made a point of this not being a "naat" but a kahani: http://www.youtube.com/watch?v=38AFzOwE2JE&feature=related