How much practice time?

I have played guitar a little before, mostly kid songs I learned to help a children's pastor friend of my moms, but I really learned what guitar enough to say I knew how to play. Now that I am older and have kid, school and work it is hard to find time to practice but this is something I want to do. So my question is, how much practice time should I set aside a week/day?

Well my point of view as always been...1 hour minimum per day. If you can do more, great ! But I think that you really need 1 hour min per day to sink in enought information to move foward at a reasonable speed.
But then again, it all comes down to " whats your goal in music ? ".
If you only want to learn song and play them around a camp fire or with friends, you dont need as much practice time then someone who wants to understand and write music.

I agree with Sebast, of course the answer would be: the more the better. But I think we should try the work out at least one hour. I actually have the same problem, my only time available to practive is in the evening, and some days I m just too tired. One interesting question to ask to the instructors would be, is it the same if we do practice like one hour per day or, for example, do 2 hours every other day? Would that give us the same results?

From the perspective of a mom with a job, (really 2 jobs), primary care taker of the kids with their own hobbies, and a goal of wanting to be in a band one day....
I am not worrying about how much time practice time I put in...I mean obviously you have to put in some/enough to keep moving forward, but I just do what I can...sometimes I can go 4-5 days at an hour - or two, to 5 minutes here, there, anywhere, sometimes its once after 3 days.... I just try to squeeze in what I can where I can. I really like doing several short sessions. (5 - 20 minutes) in a day...that can really add up. it also seems to work out between dinner, cleaning, kids, etc... With this irregularity, I have made progress, albeit very slow. but I also have realistic goals...I just want to be ready for a band in 5 years, when the youngest heads to college (or at least out of high school). My kids play banjo and mandolin and what they do in a week takes me a month, I just don't let that discourage me...I just keep plugging away.
All that is also why guitar tricks works so well for me, Its available whenever I need it to be available!!!!!!!!!!!! ( I also have a goal to be a guitarist, fully trained by guitar tricks.com)

so in the end...just do what you can and don't beat yourself up about what you can't do.
:)