Taking an existing idea and slapping Bitcoin on it isn't exactly innovation and won't bring Bitcoin to mainstream civilization. We need new ideas that stand in their own right that can be supplemented by Bitcoin in order to give people incentive to use it. Regular merchants will be easy to gather once unique and successful ventures are already using Bitcoin.

So, in a nutshell, selling toilet plungers or any other widget for Bitcoins is not the way to go unless 1) you already have a successful business doing it or 2) your main value is not receiving Bitcoins.

If you want Bitcoin to get big, create something awesome then tack Bitcoin on as an accessory.

If Bitcoin will do well then it will stand in its own right and people will naturally use it as they see it. Otherwise, we need to reconsider the concept.