A really good idea,
Tbird... We did the same thing a few years ago, and stopped only when the space for the containers was needed for a strawberry patch. They do have, as you noted, a very low Ph requirement, which is more easily controlled in the containers.
Here's how one guy does it:
http://www.davewilson.com/homegrown/promotion/ bluecontainer.html
Best of luck! (The flower catalogs are coming fast and furious... they really know how to entice one into interest, in the dead of winter... it was -22F here last night)