I'm just about done with the desk I've been building. The only thing left to do is putting a couple of coats of paint on it.
I ended up making the desktop itself out of MDF since it is stable, flat, and heavy. I routed some nice edges on the desktop but I've been having trouble painting the routed edges because they're so porous. I found a recipe online for a sealer made from 4 parts water and 1 part wood glue which should fix that problem. I'll try that out tonight.
I'll post pictures as soon as I get the desk done (hopefully this week).