This instructable will show you how to take a tall, narrow Ikea bookshelf, plywood and a sheet of whiteboard and make a stylish multi-functional project desk. We use it as a computer desk, scrapbooking area and a place to sketch or leave notes with a dry erase marker. The whiteboard material will stain (a red candle sat on it for awhile and stained it even though it wasn't burning), so keep that in mind. This one is 6.5' long and 2.5' wide. I think it cost about $25 for everything except the shelf.
Plywood (at least 1/2")
Whiteboard (cut to the same size as your plywood)
Donor shelf (mine was Ikea, but I think any tall/narrow shelf would work)
1" Wood screws
Liquid Nails (or similar heavy duty adhesive, and 1 tube is probably enough)