I've been wanting to jump into the Mac scene for awhile now, and these new iMacs are exactly the excuse I've been needing to force myself to do it. An iMac with a dual-core Intel chip? Man, two years ago that would have been unthinkable.
I have a setup like you want, StaggerLee, but I don't have a converter. I have a cable that connects from the laptop VGA to the TV VGA. The cable is the same at each end, kinda trapezoidal with the screws on either side to tighten the connection.