I notice that the Sony Media Softare paper catalog has descriptions of Excalibur, Tsunami, etc., but there's no equivalent on the Sony website.
I think Sony's missing a marketing opportunity by not advertising the growing number of plug-ins, scripts, presets, or add-ons to Vegas. Adobe has a "3rd Party" developer page; Sony should, too. I think the scripting capability, the freely SDK, the plethora of .veg files and the ability to save effects presets and chains make Vegas the closest thing to an "open source" editing solution out there.
A page of links could include:
Excalibur
Tsunami
DeBugMode (Plug-In Pack, Wax 2.0)
Sundance Media
Boris
and all the other plug-ins, etc., both free and priced, that I can't recal right now. (See, this is why we need a comprehensive list maintained in an obvious place!)