[thanks! aaron, kath, nicole] tipped me on this, so i'm guessing that this is going to be a favourite for many.
see van's decluttered ikea jerker desk, the source of desk envy.
what's the secret?
van says, "actually, everything is mounted underneath using mdf pegboard and some wire.
the pegboard is suspended using these shackles and small wooden dowels. if i ever need to make changes, the pegboard can be easily removed simply by removing the five dowels."
brilliant! van has very, very good pictures and instructions on his site. there are also currently 8 reader submissions of their versions. link.