Would be really awesome if you could nest groups of columns in board view into parent columns. To organize processes. For instance:

I use board view to keep track of all of my contracts. I use points to represent the contract value (which is great because I can really easily keep track of how much $ is in each stage without leaving my board or using a calculator). I have a series of columns that I use for different stages of Leads/Opportunities. A series of columns for the stages of contracted work. A series of columns for stages of post-completed work (completed/billed/paid). A series for each year of completed work where I can keep track of all of the projects I did that year. And a series for dead/cold leads.

It would be cool if I could nest all of the columns for each stage into one collapsible parent column. That way I can use my one board to easily view the things I want to work on now, without having to look at all 16 columns (which is a lot even when collapsed), or creating multiple projects for this.