What you need is what I just installed about 2 weeks ago.
You need:
1 - VW MDI kit
2 - Fiscon Pro Bluetooth kit (Also known as Fiscon Basic Plus)
Look on ebay for good prices esp from sellers in Germany. The kits are both very easy to fit, plug and play. They are both brilliant and I can completely recommend them. The MDI kit allows full touch screen control of your ipod. The Fiscon allows full touch screen integration of your phonebook and all phone functions. If you have the highline computer (which i dont

) you can also access your text messages from there. Any questions on either of the kits just let me know.
If your R32 is already coded for a phone then the Fiscon will work immediatley. If not you will need VCDS/VagCom coding for it to work correctly. Its all in the manual and very easy to do. If you dont have someone near you with VCDS/VagCom your dealer can easily enable the phone feature on VCDS.