Here's an article I wrote for here a while back -
http://garden.org/ideas/view/j...
It specifically addresses daffodils but would apply pretty much as is to tulips and other spring flowering forcible bulbs.
I've got 45 pots of daffodils and tulips in their cold stage at present.
I have very good success transplanting daffodils into the garden after enjoying their forced blooms. Bulbs blooming in-doors in the winter reduce the 'winter blues' to a very considerable extent.
I discard forced tulips as they usually split after the force.