Today I was using easydebian with the image file debian-m5-v3e.img.ext2 but it has openoffice 3, it is a bit slow and it doesn't support .docx or .xlsx files. I' ll try with other image file to see what it has libre office and if it is upgradeable.

on N900
I have been using abiword and gnumeric for .doc and .xls, working fine. The versions I have doesn't support .docx or .xlsx so it comes handy convert the files online and download it in .doc or .xls format

http://www.docx2doc.com/convert/