I bought a $1K DVI2USB Epiphan device for BoinxTV and it has serious QuickTime component issues that make it unusable. Does it still work for you? Under Snow Leopard? Pleas elet us know if something got broken under Mac recently? Epiphan's support leaves a lot to be desired. Don't even have support forums.
We have no issues with our Low-End VGA2USB under Snow Leopard. What problems do you run in?