Well, I just transferred purchases from one Apple ID to another.
What happend? I bought an MacBook Air and set it up with Apple ID "A". But the MacBook was intended to be used by a different person with Apple ID "B", which I didn't know at the time I set up the MacBook, so I had to take some and took "A".
Therefore, all the iLife-Applications (iPhoto, iMovie, Garage Band) that were shipped with the MacBook belong to Account "A" - which I do not want, as many of you in this thread. I want to give the MacBook to "B", and also the apps that originally shipped. No way to do so.
I completely formatted the SSD and reinstalled Mountain Lion, but when opening the App Store, "B" could only buy iLife Apps. Apple somehow mapped them to the MacBook, but a different account.
So it took a long phone call with apple support (which is free in the first 90 days after purchase 😀 ), and - using a tiny bit of angry voice - about 50 Minutes later account "B" could adopted the iLife-Applications that initially belonged to "A". Still downloading 🙂...
My conclusion is: It is possible to transfer Apps from one account to the other, but you have to talk a while with the support team. It's more or less a manual step for them. I hope all of you soon call and try to get your transfers done - maybe then they will implement some self-service in the app store in the future.
Cheers,
Andreas