Might be worth linking in a few good episodes from the Fightworks Podcast, in particular the following:
#007: Deadly Mat Bacteria (interview with guy from the Center for Disease Control)
#074: Staph
#114: Cauliflower Ear (interview on the topic with medical professional who trains BJJ)
The other big question that I tend to see a lot is "Where can I train BJJ in [somewhere]?" Two resources around that can answer that fairly easily, depending on location (though both can be a little temperamental on loading, as they're relatively new):
TrainJiuJitsu.com (US)
bjjMap.com (mainly US, but also Europe)
Gym Database (BJJ, MMA etc)
Also a bunch of Google Maps:
Pittsburgh (by frodo, I think)
San Diego (by
Caleb, from the Fightworks Podcast).
Florida (by some guy listed as 'Gary')
Then there's
this big one simply called 'Brazilian Jiu Jitsu Gyms' by somebody posting as 'Misho', which as far as I can tell is a whole load of places around the US rather than a specific state.
Finally,
this is the one I've been building for the UK. Details of clubs below, with link to larger map at the top. I've also been writing a
BJJ Beginner FAQ, which may be of use to newcomers to the sport.