I think walt.farrell is correct - give it a go (Power Duplicate)
ie - if you have one business card for example (as a group) make a duplicate (edit - duplicate) move it to the right by as much as you need or the gap you require then do another duplicate the group will then move to the correct spacing. once you have the horizonta - simply group the whole lot and do another duplicate and repeat the process downwards or vertically.
Yes its not as quick as Indesign but still quite quick, I am sure eventually AF will surely add a step and repeat function.
Using the alignment method is also fairly quick. As GaryP posted.