Dropbox for a while now has been opening up their API to developers. Since then iPhone and most recently, Android and iPad apps have arrived. Now, the Dropbox page is showing that a BlackBerry application is "Coming Soon".
BlackBerry users have had access to Dropbox in the past but that was simply through their web interface and honestly, wasn't the best. Being a Dropbox user I'm pretty excited to see this happen, I just hope its sooner then later. Dropbox offers paid and free solutions for storage, right now free users get 2GB of space with an additional 250MB added if you invite some folks to join Dropbox with you.