a) its free b) its free :D Most of the kanban boards out there worth their salt cost some serious pennies if scaled to a large team! plus... as far as I know

a) its free b) its free :D Most of the kanban boards out there worth their salt cost some serious pennies if scaled to a large team! plus... as far as I know Trello doesn't have the functionality for WIP Limits This board also integrates nicely with GoogleApps, if it has integration with tfs (not sure if it does) then it would stand a good chance of owning a piece of the PM scene in .net land