Close. You need a PC with a broadband connection. It can be wired. Said PC has to run Windows 2000 Server (or NT4 Server). Terminal Services is an optional component included with those. You need a wireless card for the ePods. You need a wireless card for the PC.
You do not need an Access Point / Wireless Gateway. The PC will take care of that for you.
Terminal Services is a service that allows you to have a logged-in session at your PC, while displaying the virtual screen on a remote device. All the processing occurs at the PC. The ePods simply forwards keystroke and mouse events to the TS PC, and the TS PC forwards screen updates to the ePods. Unfortunately, TS doesn't support sound (so no sound on the ePods), but you can use Citrix MetaFrame instead of TS (it is a souped-up version of TS), although that is a separate cost.
I'm doing what you are asking about on my home network. I'm running Win2k server on a 200 MHz Celeron with 64MB of RAM. Not the fastest thing in the world, but it works. The wireless cards (I'm using the Wavelan/ORiNOCO Silver cards) run in peer-to-peer (ad-hoc) mode, so they don't require a gateway. Essentially you are using the wireless network solely to support your TS traffic. In reality, you are actually surfing from the PC itself. This means you can surf and use whatever apps you like that run under win2k. And this is also why it runs so much faster than browsing directly from the ePods.
Hope this helps!