Ok...well firstly I'd have a look at the notes section....i found a few good things there what with linking speeches together.
It also might help to know what question you need to answer
Ill put up my essay...i cant remember what i got for it - probably around 13-15 out of 20...not so great a mark but it gives you an idea. I did King and McAleese.
Heres the link for the resources:
http://www.boredofstudies.org/view.php?course=6
Any of the comparisons between texts are good...youll have to scroll through, but the ones i found really good were from around 2004/05 i think.
The main things you need to address i think, are Rhetoric, how the speeches transcend time (techniques...relevance today..), and some links between the speeches as well.