For what it's worth... I have a Linksys WRT54G in the house. I have two SB radios, one upstairs and one downstairs. I bought a Linksys WAP54G for downstairs as a wireless range extender. The two WAPs are named WAP-UP and WAP-DN. I can get on the Internet with my PC from either WAP, but neither SB radio will work at all! If I unplug power to the WAP54G, both SB radios work fine (although the downstairs one has a pretty weak signal). With the WAP54G on both SBs get a good wifi signal and see both WAPs and either SB can select either WAP but will not play music from server or Internet radio.
I gave up on it.
Roku M1000, M500, SB Radios, Netflix Player, WiFi, Win7, Windows Home Server, Verizon FIOS router