Thats it for the iphone. Headsets ibluenova like you said doesnt work on iOS 4 sooo youd have to downgrade to 3.1.3 to use it. Works nicely i must say, tho I dont care for bluetoothing so Im ok on iOS 4
Thats what iBluenova was for. Tp connect via bluetooth to devices such as other iDevices and laptops and so on. Without iBluenova, all the iPhone can do is connect to bluetooth headsets. iBluenova is the only means of bluetooth connection for file transfers to other devices. On iOS 4, it is not supported so then yes, there is nothing you can do but downgrade to use iBluenova.