Today I was setting up Google Apps for my church. A change in ISP led to us creating a more permanent solution for their mail needs. I was able to set up multiple boxes and provide other tools for my pastor and the staff.
It’s my recommendation that when you have a business or organization you get a domain name and use a email address with that domain. It will be with you longer than most ISP’s will. It also gives you a more professional way to be connected in your business. Google Apps will also give you docs, drive, calendar and more so so why not do it.
The one thing is you have to change your MX settings. The domain registry had a tool available to make the change automatically. Once you get it going you won’t have to worry about it.