Recently I revisited Aquamacs (1.7), to see how I could set it up for a distributed collaboration scenario. Here are a few things I found helpful.
Set up Aquamacs for subversion:
I used psvn, rather than the built in support. Download from here : http://www.xsteve.at/prg/vc_svn/
Create a folder ~/elisp and save the file as psvn.el there
Add the following lines to ~/.emacs:
(add-to-list 'load-path "~/elisp")
In Aquamacs use: M-x svn-checkout
and you will be prompted for the repository URL and your local download directory.
Set up Aquamacs for IRC: http://blog.katipo.co.nz/?p=39
For a good overview of basic LaTeXÂ http://en.wikibooks.org/wiki/LaTeX
Convert LaTeX to XML http://jblevins.org/log/latex/xml-tools
And, of course: http://www.statistik.lmu.de/~leisch/Sweave/