There should be these hooks, in my opinion, on any theme.
* Logo – filter
* Custom CSS – filter
* Below the header – action
* Above the first post – action
* Between every post – action
* After the last post – action
* Above, below, between every sidebar element – action
* Separate footer hook at top of footer div – action
* Credit/Copyright in footer – filter
What’s sad is that I don’t know much about this to explain further. Article soon, hopefully, after some research. Via Themeshaper.