First, thanks for the help; really learned a lot about setting up networks this weekend.

I got tired of banging my head against the wall so I found a coax splitter and moved my router into the living room so I could keep the wired connection to the Slingbox intact. That seemed to do the trick but when I plugged the router into the drop there (so the rest of my wired drop can get Internet access), I wasn't seeing any network activity in my switch. I suspect there is something not quite right with the wiring from the closet to the drop in the living room. I have an adjacent drop in the kitchen and that's never worked either, so maybe they used the wrong cable as PTravel suggests.

I went out and got a USB wireless N adapter for my desktop until I can get everything straightened out.

It looks like my next step is to look into port forwarding; we're going to Europe in a few weeks and I'd like to try out the Slingbox. It sounds like Port 5001 is blocked a lot, so I should try to change that.

Thanks again.