I'm not even from the US.
(But where I live, we have "national health coverage", thank you.)

But it's true - corn-starches aren't very good for the overall health.
Nevertheless, teeth need a lot of attention - and sometimes a dentist.

Dentists? Nope
Doctors? Nope
Nationwide medical coverage? Nope
Anesthetics? Nope
Rather Complicated Operations? Yes, surprisingly - but at full consciousness!

He had to pay it back, though.

Ironically (maybe unsurprisingly), the "former company" was an audit and accounting firm....

I had the lady on the phone - she was almost flabbergasted ;-)

The very few support calls I can solve with Teamviewer from work or home.

Windows isn't a system for the casual home-user. It only works reliably when an army of competent sysadmins pamper it daily. There's no point in giving a relative a Windows PC or laptop if you have to maintain it yourself.

I don't get paid enough at work to use Windows - I certainly don't want to play Windows sysadmin for free.

I don't own any iPad - I'd probably buy an iPad4, rather than an iPad Mini because I currently don't want to carry anything bigger than an iPhone 4S in my pocket - and I see more usage-scenarios for me with the iPad4.

I hope there's still an iPhone 4S-formfactor phone from Apple in two years....

But the USP of MacMinis isn't size or power-usage - or anything else relevant in a traditional server-setup:

It's OSX.

I especially like the PERL/Ruby APIs, but the thing is written for Rails2 and would need some refactoring.

I know there's GLPI - but I don't need most of the stuff it provides (and I'm not sure if it would fit our use-cases) and I'd rather want something that can be plugged into existing solutions via APIs...

(insert picture of typical obese American).

When customers contact us because they can't receive certain mail, we try to whitelist the IP(s).

When customers complain that they can't send mail to a certain person because our IPs are blacklisted, we ask them to ask their recipients to have our ranges whitelisted. It's almost the only way this is going to work. No point in trying to have someone whitelist our range over the phone in a company with several layers of managers between a helpdesk-agent and a server-operator.
We don't host any spammers, but sometimes accounts get hijacked and spam does get sent from our IPs. When we find out, we stop it.
But still, blacklistings do happen.