Divide checkbox list into 2 columns?

[ZiNgA BuRgA]

Would you be able to give more detail?
Methinks a simple <table> would do the job...

EDIT: I was wondering why you posted this in the XThreads forum - do you mean the checkbox thread field type?  Unfortunately, it's slightly tricky - you've got to hide the input field and then put the HTML into the template.