Ant Task and Diff Export

Hey all -

I have two unrelated questions that I thought I'd try to ask at the
same time. The first I've asked before, but I've learned a bit more
about subversion and it's language so I'd like to see if I get a
different answer by phrasing the question "correctly" (just in case I
was misunderstood before):

1. Is it possible to export (not checkout) the diff between two
global revision numbers?

2. Does anyone have a good recommendation for a Subversion Ant task
(and, if possible, good instructions for installing/configuring it)?
My subversion server is a linux machine and I work on an XP machine
that does not have svn installed. Following up, it definitely appears
that I need the svn command line executables (which makes sense), but
does that mean I need to install the entire svn package? I do run
Cygwin locally, so I can get it from there easily enough.

Thanks.

-- 
Rob Wilkerson
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