It sounds like your DH is so busy making a living - he hasn't had time to make a LIFE.
I hear what you are saying, I don't totally see it that way, but I get it. We have a great life, 3 kid, very happily married for 17 years, a lot of fun togehter, he jsut doesn't have as much time to enjoy it.
At any point in your life - when work and life cannot be separated - there is a serious problem.
I agree, the good part is we are still his priority so he will do whatever he has to to be with us, but then it means working overnight to make up for it. I have a lot of guilt for that but he wouldn't ever miss the kids things or our dates because he doesn't want to look back and have missed out.
This is a VERY out of the ordinary thing to do - but have you considered talking to your DH's direct supervisor? You can do it in a way that isn't complaining - and isn't disrespectful. But in a way that his Sup. knows that your DH's health and family life are being jeopardized by work literally - NON-STOP.
No, not exactly but I have done some passive aggressive things, any more I think would be crossing the line. For example we ran into his boss once on a weekedn and our family was out and he came over and said hello and were we ahving a nice time and I said we were trying but it was hard since DH wasn't there and it was more a a family event. He didn't reply.
Also when I take himm dinner at night sometimes he will say how lucky DH is that we'll pack up to have dinner with him and I have said yeah we think family dinners are important so we take dinner to daddy or he needs a taste of home. One thing he's stared doing, and I wonder if it will help is the owner's son who DH is friendly with is on DH's facebook and he's been using the checking in thing on FB, the one that tells where yo uare to log when he's there. He only started it about 2 weeks ago when he got his Droid and so far the son hasn't said anything but he was kind of hoping he'd notice and say something to his dad.
If your DH HAS to answer his phone when he is at home - and works 80 hour weeks, I certainly hope he is making $150,000+ a year. If not - he needs to think of a career or at least an employer change.
HaHa Ha, not even half that, but honestly this isn't about money (though more would be nice.) We are content with our lives, we have a small house and 2 old cars and have to save for everything but we both value time more then stuff so while making that uch money would be amazing, I'd still rather have my husband then the money. He is a super smart guy, but the little college he has isn't worth much. He's truly an IT guy, he has no schooling in any of it but stunns people all the time with what he can do. The list of people who call him for help is extensive, so a change fo career isn't an option. As for employer, I'm all for that but rigt now it just isn't in the cards.
Having ONE IT employee with a company of over 3,000 is frankly VERY irresponsible on the part of the employer. Ever if there only 1,500 users on the network - that is FAR too much for one person to handle.
I coudn't agree with you more. It is insane, but true.
Your DH needs to discuss a few possibilities with his supervisor - College Interns, part time (non benefit eligible) employees, or recent college graduates seeking a 'MENTORnship'. I had several friends on college that were Information Systems majors that really had a tough time getting a job because they didn't have any 'Professional' references who could attest to their work ethic, knowledge level etc etc (aside from college professors who sometimes aren't favored references for employers.)
See that is exacly what he'd been thinking, someone who needs to get their foot in the door like DH was not that long ago. He was makinhg next to nothing and we lived on Ramen for a while but it was so valuable in the long run.
Your DH's company may SAY they appreciate him - but unless he is making an executive salary - and has an unbelievable amount of leave time banked - they really don't appreciate him much at all.
Again, I totally agree with you, as does he, but again it isn't so easy to change when yo uare the sole provider for the family and don't have a college degree. Many companies don't care about that, but in this market they can be a lot more choosy.
As far as what you can do - love him in every way you know how

- and make sure that you keep him in touch with the kids - and then gently let him know that you miss him at home - and that you miss him!
I am good at that.
My final piece of advice - you REALLY need to go on at least a 7 night
Disney Cruise 
- where working - of any sort - is NOT at all an option. NO laptop - NO Phone - NO Internet - and the Blackberry is locked in the SAFE!
Well, that isn't in the budget but it sure is a nice dream. And even if it was in the budget, he isn't allowed to not have his phone on even on vacation. He will put in a good 3 hours a day when we are away, we went away earlier this summer for a week to visit family and he worked a full day from there every day (and yeah, they still chared him vacation days.) I think they only day he doens't get a call is Christmas, the only day the restaurants aren't open.