See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
For a list of all currently documented Intersil chipsets with specifications, see Intersil.
EtherFast Cable/DSL Wireless-Ready Router with 4-Port Switch
This model was also (presumably) sold as the BEFSR41W-RN, which, instead of a Intersil card, used a Merlin Ricochet modem card (and perhaps had some additional hardware differences).