Nearly two years ago I wrote a version of Klondike Solitaire for Blackberry in order to get a feel for developing for the platform. At that time Blackberries did not come preloaded with any card games, but that has changed with the latest devices.
Regardless, anyone interested in playing my version of Klondike is welcome to it for free. It can be installed OTA from:http://mobile.dexsoft.com
I am not actively developing the game at this time, but I am still interested in hearing bug reports.
Note that it is not playable on touchscreen Blackberry devices.