i am also waitlisted, however I'm not really considering it as an option. That being said, I think the HST waitlist moves quite a bit. I have a feeling a lot of people that were accepted HST (declined by the HST MSTP) were also accepted to some other top 10 MSTPs. I think more people would choose the MSTP over the HST. So good luck. I hope it works out. I hear that you should send them an update of what you've been up to since applying.