Woodmaster recently announced a new three-sided molder. It's supposed to handle pieces up to 12 inches wide and make cuts up to 1.125 inches deep. The system starts at $3,995, but if you're building or remodeling your own home, consider the cost of tongue-and-groove flooring. You could also make trim for finish work.
Instead of buying trim from a big-box store, you could cut your own lumber locally and finish it with a system like this. Purchasing the machine with a few neighbors and friends would be a really efficient use of resources.
While you're visiting the Woodmaster site, check out the molding patterns page.