Two meta-jokes that stood out for me involved Soong's failure to determine a consensus among the locals whether the actual name of Alpha Centauri IV
Velestus, Centaurus or Al Rijil IV, or his purchase of a class-M moon called Yutani IIIa presumably named after the android-making Weyland-Yutani Corporation]
fame, or--for that matter--his discussion of how incredibly difficult it is to amass the funds necessary to buy a world outright (sorry quark). Later, in a different sort of meta-joke Faur warns Picard that taking the Enterprise
to hide in the atmosphere of a gas giant could have calamitous results--why, look at what happened to the Da Vinci
when it entered the atmosphere of Galvan VI
There are other, non-meta, bits of humour, too. There's Soong's complete surprise when the Borg open fire on his Yutani IIIa in 2381 without communicating a word, and then there's the Breen reaction to the surprise of the Enterprise
landing party when they offer them prisoner of war status (basically, that they had to change things a bit when they signed onto the Typhon Pact, but they still retain the right to execute spies).
I liked this. There's nothing quite like reading a good book that's also incidentally funny.