For those of you who aren't in the know, this is actually quite a significant step, as until now the Big Finish Doctor Who licence has only covered the classic series (i.e. roughly up until the Paul McGann TV movie of 1996). This is the first range to feature any elements of the new/revived/2005+ series*.
This leaves me with three significant questions.
Firstly - and pretty obviously - does this mean we're moving to a point where the BF licence expands to include the new series? Obviously, it's unlikely that Christopher Eccleston would want to reprise the role (although not impossible), but David Tennant is a known fangeek and was basically begging to be involved in their productions before he was cast as the Doctor; and they've already worked with several actors who've played his companions (notably Noel Clarke). I can imagine Matt Smith being happy to be involved. Capaldi too, time and new series commitments allowing.
Secondly - even if there won't be a full new series licence, maybe a Paternoster Gang spinoff might be on the cards? Fans have been clamouring for it since their first appearance, and a BF audio series would be more manageable than a TV series. Even if it might end up sharing the same sort of territory as BF's Jago and Litefoot series.
Thirdly - and depending on your perspective, possibly most importantly - can we have Osgood back, please?
*Except the 2013 Destiny of the Doctor series, but that was really a BBC range with Big Finish involved in the production and distribution.