Can't usually import flash's format, SWF, into most programs. However, more and more are coming around as flash is really getting noticed. There is an app called SWF to Video I treid once that was great. I just googled that and got some other stuff, this included: http://www.golddownload.com/ADShareit_SWF_to_Video_Converter_Download_26437.html but I haven't tested it.
You can also export from flash as MOV but I haven't had much success with that.
1. Flash Movie Extract Pilot - This prog analyses your computer and lets you save all the flash movies which are cached on your drive into SWF files. This is good because a lot of sites disable the right click save as...
2. After that use Magic Swf2Avi to convert them to AVI.
I will go out on a limb here and say that Vegas 5 will support Flash...and my guess is somehow you would be able to work with it to export for DVDA that way. I do not know if you will be able to actually *import* flash projects however.
Yes if screenblast can do this and the way the web is moving, Flash video is quickly becoming the player of choice due to its widespread compatability, I do not see why Flash output would not be incorporated in V5.
You will not be able to import .fla files as this is a Macromedia format, but the ability to output swf should be a priority, especially if Screenblast already does this....