I think I'm able to use a version of iPhoto to automatically pick up photo's taken on my iPad or iPhone and synched to Photostream, into my iPhoto library - is this right?
If yes, can you have the Photo stream photo's from 3 iPhones in the family going into the same library? We want to be able to automatically add photo's taken on my, my wife;s and my daughter's phone to our master iPhoto library on our MacBook using Photo stream. Does anyone know if this is possible and how to do it?
The only way to do this is to share your iPhoto library across multiple users on your mac.
Read this Apple support article for instructions on how to do so:
You, your wife and daughter will all need to user separate user account on your Mac, then each person can sync their iOS device with iPhoto through Photo Stream as normal. As long as the library is shared as detailed in the link above photos imported from each Photo Stream are accessible for every user.
My wife and I have been using iPhoto like this for years and have also been using it with Photo Stream since it launched.
It's important you follow all instructions exactly or sharing will not work: ensure the drive or partition is shared, permissions are ignored and the every user is set to Read and Write not just Read. Also always make sure you close iPhoto before switching users otherwise the library will be locked. All of this is explained in the link above.
The only glitch I've noticed is when using automatic importing of Photo Stream photos into the iPhoto library, if you have deleted images from Photo Stream on your iOS device they still get imported into an event in iPhoto, even though they are NOT in the Photo Stream. To get round this either don't delete anything from Photo Stream on your iOS device (as you'll just have to delete it again in iPhoto OR turn of automatic importing of Photo Stream photos in iPhoto. To manually import you click on the Photo Stream option in the left menu bar, select all photos, right click and select import.
To be honest the glitch above might not be linked to shared iPhoto libraries and may just be a Photo Stream glitch in general but as I have always used a shared iPhoto library with Photo Stream I have no way of knowing, all I know is no one else seems to have the problem and shared libraries seems to be a feature not many people know about.
Hope this helps?