Here's what we've made so far. I hope this inspires someone to try this for themselves. It takes very little skill. We are complete amateurs, and yes, it is not fine carpentry work, but we weren't going for this, nor did we expect this.
My daughter's bed with room for storage underneath.
Tall table...we are using this as a kitchen island now.
Young children's pallet book shelf
Pallet/scrap wood toy shelf
Entertainment center or bookshelves
Platform bed and DIY mattress
Sectional sofa
Not lumber, but free - stump side table/stool
Free standing kitchen(full pictures will come later...we are still putting on the final touches.)
12/9/12: Okay, here is the rough unfinished version of our DIY kitchen:
My husband recently made a child sized computer table with bench for my daughter which I'll add here later.