I asked about that two and a half months ago…
…requesting that some of the popular third-party sites such as Icy Veins, d3planner, and so on be added to the trusted sites list.
Sadly, whilst the thread started with that in mind it was rapidly derailed by people placing embedded cat videos from YouTube into it because apparently it’s okay to trust any video on YouTube but not link to Blizzard’s own armoury site or their own blogs because www.diablo3.com isn’t on the trusted list.