Is there anything else that should be done. ?
No, I think you've done everything you can do for the time being. You just have to wait for a response from TrustedSource - which is where the site rating is coming from. Unfortunately the TrustedSource page for the site is not giving any information about the reason for the rating. It is, however, only a Medium Risk rating and so is unlikely to be anything serious - although the SiteAdvisor blocking page makes it look worse than it is.