I would also encourage anyone to test the miners... now rather than waiting after the launch to discover something isn't working...
I have testet the sgminer on my System whit a ASUS R9 290X
the miner give my a :
fatal JSON ERROR in configuration file
configuration file can not be used
hmm whats wrong?!?
My config file sgminer.conf:
{
"pools": [
{
"url": "***",
"user": "***",
"pass": "***"
}
],
probably that...

json error are connection problems, meaning you have problem to either connecting to the "*****" pool or wallet
no it's much easier, just remove the comma at the end :-D
"kernel-path" : "/usr/local/bin", <==== THIS ONE
}
Nice!!!
it works

THX pallas
The Miner give my 2.5 Mh/s whit my config... good or not?!?
Sys: Win 7 64bit
AMD Catalyst 13.12 <===beter update 14.6 or 14.9?!?
no it isn't really good...
I get around 7MH/s with my 290x (I still use a 13.something driver)
with this setting "-g 18 -w 32 -I 17"
for info, here what I get:
* ccminer:
gtx980 (OC) 12MH/s
gtx780ti (OC) 10MH/s
gtx750 (OC) 4.7MH/s
* sgminer
290x (msi with "bad" memory)
7MH/s with the above setting