Just came across this thread.
I also have a 330dA, a E91. Great car.
Have got it remaped and dynoed to 265hp/600Nm.
A new IC is on the way from CapeTown, South Africa since they have made som conversions down there using an IC that fits OEM size.
After fitting the car will have another remap. Expect figures in the 280-290Hp area...
And have found a company in the UK that have a Hybrid turbo ready for it. Says they can get 350Hp out of it with a DPF removal and the Hybrid.
Considering ordering such a turbo..... :-)