TRAMP provides transparent, multiprotocol remote file access and editing capabilities, AuCTeX is an important major mode for TeX/LaTeX editing and ERC is a highly favoured IRC client for emacs. This is a similar request to bug #3705, covering leim, a collection of input methods crucial for generating text in foreign languages (other than English).
http://www.gentoo.org/~mkennedy/emacs-packages.html is bing moved into CVS soon. it covers all thisstuff and more.