http://www.dolby.com/professional/pro_audio_engineering/broadcast_price_list.html
These are the official Dolby Digital software encoders available from DD directly.. They work a treat, and offer DD+ and DDTrueHD
However they dont come without a price...
A princely sum of 8grand will get you the encoder...
Now admittadly, its good for those who want to offer a higher quality encode, and the cost reflects this, but when you consider how much we pay for an NLE, whcih includes all the mastering tools we could possibly need, WITh the encoder, then Vegas is chump change compaared to this..
Im surprised its more expensive than the DTS encoder though...