My family gets teased a lot for washing our hands too much. Unfortunately, that wasn't enough to avoid getting swine flu. Our community has had a rash of infections and unfortunately we were unable to avoid infection even with our obsessive attention to sanitation.
The flu symptoms lasted for about a week. Both our daughters who are in their teens had a terrible time with it, and we, as parents, were lucky enough to dodge most of the major symptoms. We found that treatment with Tamiflu helped alleviate some of the symptoms and shorten the duration of sickness. The key is to get it in your system early. So if your kids haven't gotten it yet, I'd recommend that you get a prescription of Tamiflu filled from your pediatrician, just in case.
If you want more details, I posted about our experiences with it on my blog here: http://parentsguidetodiabetes.blogspot.com/2009/11/stricken-with-swine-flu.html
I hope everyone stays healthy- keep washing your hands!