A newbie question here: (please be gentle...)

I have a trip shcedule for March 12 (a Friday), SFO-MIA. THe plane leaves at 1pm, and here's the seat availability as of today:

F7 A7 Y7 B7 H7 K7 Q7 M7 G0 V0 O0 L0 W0 S0

So, my question is: what are the odds of me getting bumped? What would be the best approach? Should I volunteer? When? I don't really have to be in MIA until the next day, so waiting for hours wouldn't be a problem....

Ideas?