In fact, Google for Domains provides a hell of a lot.  A web-based word processor and spreadsheet (which, if you've never seen such an application in your web browser, will be a revelation - it actually works very well) with easy to manage file sharing, a shared calendar, email with top-class spam filtering and lots more besides.  And it's a doddle to set up.  Seriously, this site took me about 20 minutes, and most of that was digging out copies of the old site to get a feel for how I wanted the template to look.  I've now got something which looks similar but has a basic but functional templated CMS with a WYSIWYG editor for individual pages and no messing around with installing something like Drupal or Joomla (and no need to keep on top of the security updates for them...)

Being as this is a personal domain, I'm just using the free version - but the paid version is very reasonably priced.

Throw in accounts and payroll and you've got all a lot of small businesses need.

If you're providing sysadmin-type services for small businesses - maybe for a single employer, maybe self-employed for several - I think you're stuffed.  Google are signing up thousands of new organisations per day, and it's vanishingly unlikely that nobody else will spring up offering similar services over the course of the next 3-5 years.

Frankly, the small businessman doesn't really want to hire you, they just want their computers to work - the fact that you've set up a box running Small Business Server, a bunch of backup tapes or a USB hard disk (which you know in your heart of hearts they're studiously ignoring) doesn't impress anyone.  

There are a number of arguments against this.  I don't agree with any of them, but I'll discuss them here: