I just posted some pics of my freshly-modified YT-1300 over at BoardGameGeek.com , but I thought I oughtta mention it here, too. The modifications consist of a repositioned cockpit and sensor dish, a new observation viewport and antenna array, and a repaint.
I go into a little more detail about the kitbashing process over at BGG, but note that if you want to do this yourself, you should be aware that these modifications render the ship no longer tournament legal (any modifications to the hull place it in violation of the current edition of FF's tournament rules).
Of course, if FF decides to revisit that bit of the rules, in order to allow a thousand YT-1300s to bloom, why, I'd be okay with that. Hint, hint.