Ok, did a bit of Googling and found some info on this. According to this article, yes, the Millennium Falcon does make a little cameo in Episode III.
http://www.starwars.com/episode-iii/bts/production/f20050526/
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the Falcon
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It's tiny, but visible enough to send a warm fuzzy through the hearts of original trilogy fans. In the establishing shot of the expansive Senate docking bays, there's a tiny
Millennium Falcon easing into frame. And it's not just a non-descript Corellian freighter; it's on good authority -- namely
George Lucas -- that this is the infamous hunk-of-junk before it came into the ownership of either
Lando Calrissian or Han Solo. Also peculiar about that shot: there are no less than three gleaming
Naboo star
skiffs parked on the lot. Does
Padmé have spares?