The problem with not beveling the planks, and using the glue method as described above by Prolooney, is just as he describes,the glue expands. What he doesn't say is that it runs, and drips inside the structure. This causes excessive weight gains and just an over all sloppy build.
Maybe I should just post a picture of what I mean, JOE?
Because I can...

Glue is heavier then wood. The more you use, especially to make up for in building ability, the heavier your plane will be.
For me? I think if you bevel the planks(as described by Heavy Date). Get a good, close fit between them, use the RIGHT amount of CA (and\or Ambroid), you get a good, strong, and LIGHT airframe.

Maybe we could all take a lesson from Cabinet makers.

-Mustang51