I was helping my sister set up her new iPad and no previous purchased iPhone apps showed up in the app store. I went to my iPad and saw nothing there as well. Are other people experiencing this problem?
Mine disappeared two days ago (I have about 60 Purchased/free apps).
The last thing I did was downloading the Infinty Blade II update. I needed to free up disk space (only had 1.2GB free on my 64GB iPad), so I deleted Monopoly. After the update I went to the Purchased tab in the App Store to reinstall Monopoly, and all the icons were gone. However, I was able to manually search for it and reinstall it.
I purchased an app yesterday; unfortunately that did not cause the Purchased apps to reappear.
However, I checked this morning and all the app icons were back. So I have no idea what caused the apps to disappear four days ago and to reappear this morning. Apple may be doing a weekly restore on Sunday mornings.