Re-download apps with second computer/device My situation: 

I have an iPhone with synced to my computer and my wife just bought an iPad (in shipment) which she will sync to her computer. 

We want to use my Apple ID on both computers/devices so that she can use apps and music I have already purchased. Syncing the devices to the same computer is not an option. 

Is this an option, and how would it work, i.e., would she have to "purchase" and get a message saying it has already been purchased, and to re-download?

Thanks!
There's also the option of Family Sharing that Apple introduced in iOS 8.  

This allows you to share apps, music, and other purchases while still being able to maintain separate Apple ID's for other purposes.