My opinion is that you should not rely on Nitdroid. I love my N900s, but based on no experience, I guess that what you really need is the N9, because the N900 can be temperamental, meaning it might suddenly not work in a way that a business can't tolerate.

If you definitely need some Android programs, maybe you should just go with an Android phone. It won't have the razzle dazzle of the N9, but it will use the same programs the other businesspeople use, and that is handy.