I think a pedalboard is useful to hold any number of pedals together, whether it's 2 or 12. It cuts down on time spent setting up and is very useful for keeping your pedals organized at home and keeping your pedals organized if you're traveling from home to gig or rehearsal or jam or etc.
If I were planning a board for just two pedals I'd build it from some scrap wood or something.
P.S. (possible thread hijack)
I LOVEEEE the new pedaltrain mini that doesn't have the lip. I just realized that extra free edge of pedalboard could allow me to rearrange and get an 8th pedal onto my standard Mini setup. I think I've been inspired to remove the lip from my mini. [DEL]What tool would I need?[/DEL]
Nevermind, google is my friend. A dremel with metal cutting wheel and grinder are the tools of choice according thegearpage.