[userbinator]

More information here: http://english.stackexchange.com/questions/4246/can-or-shoul...

Personally I never use it because it can sound far too close to "ass" especially through low-fidelity channels.

[morgante]

According to that link, it's been part of "Microsoft-speak" for over a decade.

It's definitely a noun, but the kind of noun that only annoying business people use.