I have been using Cudaminer. All the tweaking seems to be going into the newer nVidia GPUs.

I haven't done any mining since coinex went down. They're rapidly running out of "next week" to get things up and running and secure.

I'd love to know where to get a HD 6970 for $100. None on buy it now on ebay that low, but the lowest price there is less than any other place. The 6970 seems to be a hard card to find. Many sellers have the 6950 but no 6970.