Yes, I am the webmaster of scvi.net. Thanks for the compliment
The nullsoft.com website has been down for several years now.
The last version of nsv tools was created in 2003 - so you have it allready.
It would be nice to get a updated version of a live streaming client - that could be used with a camera.
Interesting project you have going with myth tv - the IP tv.
You should try to incorporate multicast connectivity with myth tv some how !