We just heard back from Vudu and there's good news. Unlike any other implementation before it, Vudu on the LG BD390
will bitstream Dolby Digital Plus via the HDMI 1.3 port to your AVR. In addition, if you prefer LPCM the BD390 can decode the Dolby Digital Plus track in the Vudu stream as well. This is much better than the LG HDTVs
or even the Vudu box
itself, which were only capable of re-encoding the stream down to old school Dolby Digital before delivering it to the receiver. We were also directed to this FAQ on Vudu's site which includes all the bit rates for various quality video; interestingly it looks like you need between 4.5 and 9 Mbps of throughput to enjoy moves in HDX quality.