I have a N adapter connecting via G, and other adapters/clients connecting via native G, but I have an orphan without any 80211g option- it can only connect via 11b.
The router has options for WEP OR WPA/2, but not both. (Not that I'd default to WEP if I can help it anyway.)
My thoughts are to implement the DMZ option and connect another, limited use router that is set to 11b and WEP to get this 'littleguy' on the net for now and then access.
Toss me some 'how to avoid pitfalls' if you can re: two routers, one in the DMZ, 11b/WEP, etc, etc.