The link was dead. iFun-box is a pretty cool tool for data transfer between iOS device and computer. However, the UI is a bit buggy.Well there is this application. It might work for you.
sigh.... 8 year old thread...I'm highly recommend you this iPhone Transfer, which you can transfer your music or other data from your iPad to your new iTunes.
This thread tries to help with transferring music from a device (such as an iPod) to iTunes.I am also interested in this question. Because I found where to download music without problems, on the hoower. But somehow you need to release the memory., So you need to learn how to transfer.