The Limit

First of all, let me say thanks again to the people who replied 
to my schizo-scholasticism query.  I'm hoping, now, that I may
be able to tap into your knowledge on another issue.  In one of 
Deleuze's Spinoza seminars (2/17/81) he discusses the concept 
of limit :  "The limit of something is the limit of its action and not the
outline
of its figure." ... A "thing has no other limit than the limit of its power 
[puissance] or its action." 

I have a few questions, which I hope people can help me with.
First, can anyone refer me to where Deleuze takes up the question 
of limit and thus finitude vis-a-vis action?  Second, and perhaps 
even more interesting to me, is anyone aware of Deleuze discussing 
the question of limit/finitude as it works in Heidegger's philosophy?
I am especially interested in anything Deleuze may have had to say 
about death as it operates in Heidegger's philosophy.  Finally, I am also 
interested in texts by anyone that discusses the parallels and differences 
between Deleuze and Heidegger.  Know of any?

With much appreciation,
Dan Smith