Just a general comment/question since the Frozencoin.org site remains down:

Is anyone else having issues with GPU mining of FZ at the increased difficulty level? I had a system doing 5MHash/sec that at difficulty 500 seemed to be getting around 15 blocks per day. Today, I think it has found two. Best guess is that somehow smelter.exe is not working well at higher difficulty, and is somehow wasting effort. A tripling of difficulty should have resulted in 1/3 the block rate, but I'm more like 1/10 (or less on other systems). CPU mining on the other hand continues to go okay -- my systems (about 20 of them) are still generating close to 1.5K FZ per day, which is scaling pretty well with difficulty.

So basically, what I'm saying is that smelter and FZ don't look to be working properly now that we're at 1500+ difficulty. Also, AFAICT smelter doesn't work with stratum mining pools? So it's doubly useless. I think the smelter version that's being used for Frozen is different from the Quark version, which might explain the problem. And finally, despite claims to the contrary, I'm pretty sure smelter is using a fair amount of GPL licensed code. Maybe I missed something, but is it okay to have a program that has half of it's libraries GPL and then charge 10% of all mined FZ (or QRK) for it? It really needs to go open source, and more importantly it needs some better devs to handle things because right now it's very flaky.