Hi Chris
Had a quick, hopefully objective, look at a comparison between using Google Apps and using Microsoft Office 365 for your networking needs (noting always that Australia can be a bit slow when it comes to uploading data).
But yes, $5 per month per office user, gives you a pretty cheap network for you to log into, anywhere in the world.
And if you use Gmail collaboratively, and not MS Outlook, for your email and calendar needs, you do get those ads, yuk, yuk, but you save a fair bit of money each month.
Blessings Steve
http://stylefactoryproductions.com /blog/office-365-vs-google-apps
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