The silence from AMD on CFX issues is not taking care of the customer. As for SLI I do not know. A simple chart showing what games especially newer ones and about what % increase going with CFX would be self promoting and give folks a heads up. Instead of buying a game and being utterly frustrated with the experience (Bad for AMD) they would either hold off until fixed or play it single card knowing it is not a supported CFX game. This will also prompt developers to improve CFX support as well. AMD is just not being smart with their driver releases.
This is what baffles me the most about AMD. XDMA CFX is superior tech to SLI. One would think they would really emphasize CFX work in the drivers. They are just leaving money and bragging rights with the enthusiast crowd on the table.