I have not seen very many threads regarding people using the wireless receivers as a bridge back to the RG.
I was getting 2.5Mb/s up and down when connected to the RG's wireless and also when using my Cisco e4200 in IP passthrough.
Just to see how it would work I hardwired my laptop to the ISB7005 and now I am getting full internet bandwidth to my laptop. The next step is to connect a Netgear GS108 switch that I have laying around to the ISB7005 so I can also connect my mac mini and Xbox up with this faster connection.