[Thomas Turner] "After a bit of research I see that MainConcept MPEG-2 is a free plug-in and DVD Architect is Sony's separate DVD authoring software. For some reason I thought there was a DVD authoring component to Sony Vegas Pro 10. I guess not, that changes things a bit."
MainConcept is one of the built-in render types and DVD Architect comes with Vegas. If you bought Vegas without it then you would have to buy it separately but it's worth it to get them both bundled together.
[Thomas Turner] "What is the best way to output great looking 720p video onto a medium like a USB stick, or output the video to youtube or vimeo or something like that for my brother in law to view in a soft copy as opposed to the DVD?"
Try rendering using
Sony AVC with the
Internet 1280x720-30p template. That should give you really nice quality.
~jr
http://www.johnrofrano.com
http://www.vasst.com 
