"For the Sadducees say there is no resurrection--neither angel nor spirit--but Pharisees confess both."
This verse is a surprisingly scarce comment in ancient literature about the beliefs of Sadducees and Pharisees on resurrection, and it has engendered some interesting discussion. Here are my positions.
1. First, I agree with David Daube (1990 article) that the grammar points to angel and spirit modifying resurrection, implying that Acts thinks of angel and spirit as forms of resurrection. Since this is pretty much the only verse people use to say Sadducees didn't believe in angels, that old story goes down the tubes. Sadducees probably did believe in angels--just not angels that were resurrected people.
2. Second, I agree with N. T. Wright (Resurrection) that the use of angel elsewhere in Acts points to angel here potentially relating to the dead prior to some future resurrection event (the "intermediate state"). When Peter showed up at the door of the prayer meeting, they wondered if it might be his angel (Acts 12:15), meaning that an angelic form for Acts can be an after death/pre-future resurrection event form.
3. Finally, passages like this one are leading me to reject the common wisdom on what the word "resurrection" meant. I strongly suspect that we must close the chapter of recent scholarship (especially that of Wright) that insists resurrection as a word always implied a physical body in continuity with the previous corpse.
4. So here is where I'm at. I suspect that the word "resurrection" cannot be so neatly pinned down as so many have wanted to. It implies a rising but it cannot as a word be limited in use to an embodied rising or some future rising event at the end of history. While Luke-Acts seems to look to a future resurrection of the dead at the end of time, it apparently can also call intermediate rising in angelic form as "resurrection" and it can speak of disembodied spirit risings as "resurrection." These are both prior to the biggie resurrection, which Acts also apparently teaches.
Rather messy... as the truth usually is.