Board Thread:Tales from the Tardis/@comment-188432-20130325173913/@comment-5918438-20160130181903

Can we please collect all relevant official quotes in one post so newcomers/those returning to this discussion after all this time know what's been going on?

The only relevant quote from the link posted above which I found is the following:
 * "Vienna follows the adventures of Vienna Salvatori, the galaxy's deadliest – and most glamorous – bounty-hunter. Originally appearing in Doctor Who: The Shadow Heart, Vienna faced off against the Doctor in a war against the murderous Wrath. But despite her villainous persona, the character proved to be a hit with Big Finish's producers – and her very own series was soon being written!"

That does seem to be language which suggests that this is a Doctor Who spinoff, giving a DW character her own show, much like Torchwood. But I haven't examined this case as much as other people in this thread, so don't take my word for that.
 * "The complete Vienna range is available to order today from the Big Finish website. Her debut adventure in Doctor Who: The Shadow Heart can be enjoyed for just £14.99 on CD or £12.99 to download, with Vienna: The Memory Box available for £9.99 on CD or £7.99 to download."

They don't seem to want to separate the series from The Shadow Heart at all, but they also haven't linked her to the Doctor Who range in general—only her debut appearance, as an isolated story.