The HVX works (to some degree or other) with pretty much every editor out there.
Avid (on PC), Canopus, and Apple all have full integration across the board.
Liquid and Velocity can support DV and DV50 including full MXF support, but no HD as far as I know.
Premiere Pro and Vegas don't have any native support for it, but there's a third-party application which lets you use HVX high-def footage in both Premiere Pro and Vegas, it's called RayLight from www.dvfilm.com.