Can't remember if the previous press release mentioned DVD architect, but this is currently posted at
http://pro.sony.com.hk/pr20040306j.html
"Sony is also announcing the release of its new Vegas+DVD Production Suite, which includes Vegas 5, a Dolby® Laboratory-certified multichannel AC-3 encoder, and an upgraded version of its DVD Architect authoring and production software.
New features in the DVD Architect 2 software include: subtitle and alternate audio track support, enhanced disk optimization tools, external monitor previews, support for 24P DVD encoding and much more."