A friend of mine pointed out this little tidbit that Box shared at Mobile World Congress. During a presentation they mentioned that Box has 500,000 BlackBerry PlayBook app users since they launched in September of 2011. That is 16% of their Tablet users which is pretty impressive. Box is one of the first apps to really make a splash on the PlayBook so its nice to see them seeing a nice uptake.
Check out their full slide deck from MWC here