I've had the chance to test out the latest build of Wii64 and let me tell you I'm impressed. From the new GUI, to options, to the compatibility and game speed. This is one emulator to be expected. And you should see this new version soon on TehSkeen as an exclusive release. Here are some notes from the authors.
"We've put a lot of work into the core between all the work that's been put into the dynamic recompiler and conserving memory (mostly to have more room for the generated code). There are still issues which will be resolved in subsequent releases, but we've worked hard on making our first beta release something we're proud of and we hope you'll be excited about it too."- tehpola
"After nearly two years of coding, bug fixing, and testing, I think we're all proud to announce we're just about ready for a release. Beta 1 will mark the years of hard work which have been infused into the emulator in our spare time, I hope you all enjoy what you experience, and just remember, this is only beta 1 "- emu_k1d1d
"In preparation for our first beta release of cube64/wii64, we worked hard to make improvements to the graphics and also to develop a better menu. We're proud of the result, and we hope you enjoy this release. Please look forward to more good things to come." -sepp256
Source - tehskeen Tehskeen.com
UPDATE - Wii64 has been released, LOOK HERE.