#!/bin/sh
"/home/bigsmoke/.wine/drive_c/Program Files/Microsoft Office/OFFICE11/XLVIEW.EXE" "$*"

This works pretty well, except when trying to view a document that’s not in the current directory:

xlview "/tmp/Some Excel sheet sent to me by someone.xls"

To make that work, you need to use a handy utility that comes with Wine, winepath. With winepath, I can modify the script to work (the example is for wordview):

#!/bin/bash
path=`winepath --windows "$*"`
"/home/bigsmoke/.wine/drive_c/Program Files/Microsoft Office/OFFICE11/WORDVIEW.EXE" "$path"

This, together with Linux’s binfmt_misc makes executing Windows programs on Linux a breeze.