Nothing by bluetooth, unless you jailbreak, then maybe.
While it is not a perfect solution, you can use GoodReader. It has a mode that will create and IP address and page for file transfers. You could then access this page using the phone's browser and transfer files that way.
They would end up in GoodReader, and you need to be on the same network.
It might also be possible to use the Camera Connection kit with the phone, if not directly then using the the SD card reader and a mico-SD to SD card adapter.
That's about it for ideas on my side. I did a quick survey of the Market, but couldn't find any apps that would do the trick. You'd need compatible apps on both the phone and iPad to get bluetooth working.
