zefie,
On the V the accelerometer doesn't work the latest build of Xionia, but does work with the beezy's kernel from Thunderom 1.6.2. I searched through the thread to see if this had been mentioned as a problem the S, but didn't see anything (sorry if I missed it). Since the hardware is identical, this seems strange. Have you verified that the accelerometer works with 005 on the S? And if so, any ideas why it wouldn't work on the V?
Subjectively, Xionia is faster and more responsive than beezy on the V, especially with regards to touchsreen lag, so I'd like to run Xionia if possible. I have no hard data to back this up, so it may be my imagination. Beezy's is still way ahead of the stock build and it's pretty amazing what you both have done, so thanks to you both.