Very much this. Sometimes, I don't want (or can't) open OO.org, I just want to be able to get a quick glimpse in Emacs (http://www.emacswiki.org/emacs/UnXls htt

Very much this. Sometimes, I don't want (or can't) open OO.org, I just want to be able to get a quick glimpse in Emacs (http://www.emacswiki.org/emacs/UnXls http://www.emacswiki.org/emacs/UnXls) or mutt of a simple table of data someone sent me, but so far there are no quick CLI tools (that I've found) to do this. It almost feels as if Microsoft said "hmm, all these free software products can open our files, but they're still complaining about open file formats; how can we abuse our monopoly even more and guarantee that some truly open standard doesn't get mandated?" and thus was born docx, xlsx, pptx, etc.