Edward Nelson's book "Quantum Fluctuations" (Princeton UP, 1985) gives an alternative way to introduce trajectories, quite different to the trajectories of de Broglie-Bohm type approaches. I've read the book in the past and university libraries generally have copies, but I've been unable to find a good open web reference
Researching this Question, I came across one of the best graphical presentations I've seen of how a 2-slit interference pattern can be generated by particles, http://www.cs.cmu.edu/~lafferty/QF/two-slit.html (in Java), with, as explanation, page images and a PDF of chapter 3 of Nelson's book.
I also found plenty of published work. WebOfScience returns 21 review articles that cite Nelson's book. "Research on hidden variable theories: A review of recent progresses", Genovese M, PHYSICS REPORTS 413(6) 319-396, JUL 2005, sent me to what at first glance looks an interesting review article "NON-LOCALITY AND LOCALITY IN THE STOCHASTIC INTERPRETATION OF QUANTUM MECHANICS", D. BOHM and B.J. HILEY, PHYSICS REPORTS 172(3) 93—122 (1989).
EDIT (modified): Does anyone know of other open access web resources? EDIT (new):If someone has a favorite subscription-only review article, that would be nice to know of as well, but my perception is that Nelson's approach is particularly unknown outside of academia; if someone is asking questions that suggest that thinking about Nelson's approach might widen their horizons, I want an easy place to tell them to look. Stanford Encyclopedia of Philosophy seems not to have a discussion of Nelson approaches, for example.
Finally, I make this request because although it's relatively little known I consider Nelson's approach something that anyone thinking about QM should know about, so I'd like something to be able to point out to people. I consider it significant partly because it demonstrates that de Broglie-Bohm approaches are not a unique way to introduce hidden variables. The way in which stochasticity is introduced is conceptually different in that the trajectories are stochastic instead of the initial conditions, which puts QM in a significantly different light than de Broglie-Bohm approaches.