Can Microsoft Office 365 or a similar web app be used from Ubuntu?

I need to generate Word documents (both .doc and .docx), which will work on a typical Windows or Mac setup with any common version of Microsoft Word to the degree possible. LibreOffice sometimes doesn't do the job, the layout comes out different.)

This thread explains how to verify a document for Word compatibility using SkyDrive. Is there a solution that allows editing? Would Office 365 (paid subscription) work in Firefox/Chrome(ium)/?? on Ubuntu?

I got this working on Ubunut using this user agent spoofer extension, http://spoofer-extension.appspot.com/.

It doesn't work on the built in Windows Chrome 13 user agent, but if you use this user agent , taken from this site, Mozilla/5.0 (Windows NT 5.2; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.63 Safari/535.7 It should work.

Note that you may have to logout and log back in for the user agent to be properly reread.

While not a web-app, I am successfully running Office 2010 using PlayOnLinux (http://www.playonlinux.com/en/supported_apps-3-0.html) on 13.04. I use it daily and find that this is the best solution for the compatibility you are looking for. I've used CrossOver (http://www.codeweavers.com/) previously, but I find PoL works well and there's no cost.