You currently need a Linksys router if you want DHCP through the WET11.

That's not true. I currently use a WET11 to connect my Mac G3 to my D-Link router/AP. Before that it was a Siemens and before that it was an SMC. All worked with DHCP. My IPs are 192.168.0.X. I don't have a Rio Receiver at the moment, so I am unable to attempt to help you guys too much.
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-Rob Riccardelli
80GB 16MB MK2 090000736