Way to view MS Office's new file format

[Steve Grace]

On Tue, 2008-07-22 at 09:18 -0500, Linda Hanigan wrote:
> Is there an open source way to view MS Office's new file format?
> We are starting to get more of these annoying files as email
> attachments. 
>                    Thanks
>                    Linda

I recently received a Word file with the extension ".docx" (which I
assumed was the new Office format). The file opened with no problem in
OpenOffice.org Writer.