I'm reading this for fun -- tutorials and book recommendations on the Bayesian methods toolboox with a cognitive science/machine learning slant. Comes from the Computational Cognitive Science Lab at Berkeley. I recommend the general 2008 tutorial.
Useful stuff included in tutorial:
Parameter estimation
Model selection
Why Occam's Razor emerges naturally from the Conservation of Expected Evidence
Graphical models
Hierarchical Bayesian models
Not completely defined at the moment since I'm a 1st year PhD student at NYU, and currently doing rotations. It'll be something like comparative genomics/regulatory networks to study evolution of bacteria or perhaps communities of bacteria.
Then you may be interested in the research of Michael I. Jordan. (The computational biology link will probably be the most useful to you, but as you can see from the diversity of applications, he's quite the generalist.)