Afaik, All exploitable dsiware games have been pulled from the e-Shop. Also, you don't need to wait for sighax, assuming you are wanting to downgrade, as you can use waithax for that; providing you have "one of the golden four".
Edit: ninja'd :lol:
Booted up the FasthaxAlpha.3dsx and got a black screen :lol:
Backdoor isn't implemented properly anyway... wait 'till the 3rd, if nothing changes until then of course.