The problem is that free accounts in Wordpress.com don’t allow uploading .ods files (but do allow .xlsx files). However, I have uploaded the file to one of my VPS’s, so you can download it now in an OpenDocument format:
http://80.255.11.219/amos/ComparingLinuxPhones.ods
(Technically, XLXS is an open format if you don’t mind MS corrupting the standardization process and using binary blobs. )