As long as you're painting file cabinets, why not paint accessories to match? Unifies your look.
pretty file cabinet
File cabinet to desk diy makeover. This is a good jumping off point. Don't like the paint job but I could see this painted with wood for the desk part.
This is a dresser faux painted with hardware to look like suitcases. How cute!
diy filing cabinets: picturesque splendid savvy mode easy diy desk idea with ugly file cabinet
6 file cabinets = loft bed
Old photo dresser: could use on file cabinet.
Furniture Refabs | I love this idea for adding picture frames to the front of file cabinet drawers for a classy makeover!
Iannone Design - Cork Filing Cabinet - Pedestal modern-filing-cabinets-and-carts
Rough Luxe Vintage Metal Filing Cabinet Encased in reclaimed Wood