I have this set up at home as well. I use 2 cheap wireless routers set up as a bridge.
1 wireless router on the work bench for you to connect the desk tops on your bench to, and the other, across the room, connected into the internet.
My set up is slightly different, as the internet router is where my work bench is because I like the updates to be a wired option, not wireless, as I believe it is faster and safer. The second wireless router is across the room with my XP laptop, windows 7 pc and linux netbook connected to it by patch cords.
No need to trip over the ethernet cable anymore.
You can tie the switch in with a wireless bridge or a power line ethernet adapter set (depending on your electrical wiring configuration). Either will provide connectivity between the wireless router and the switch. The difference is transmission speed.
Once you bridge the two network segments make sure you have only one DHCP server enabled and one connection to the outside.