SOny Vegas DVD Architect 5.0 Now available for download
 

It's a free upgrade for version 4.5 owners. Adds Blu-Ray support.

http://www.sonycreativesoftware.com/...pdates/dvdapro

This was announced at NAB as an update that would be free to DVD Architect 4.5 owners. However there are reports elsewhere that it will only be free until the end of the month, so probably worth downloading sooner rather than later just to be safe.