My guess would be that maybe your spam filters are set too high. I have heard that some people do not get emails from Sedo because of this. Check if the email went to your spam/junk mail folder. If not, see if you can turn down your spam filter somehow.
I am pretty sure that when applying to regular Sedo, that approval is instantaneous and that there are requirements other than that you have not bee kicked off of their system before. So, you should have already received confirmation.