For a list of all currently documented Intersil chipsets with specifications, see Intersil.
Also known as the..
Ashton Digital WRUB-2045i
Edimax EW-7111Ug and GWU-01G
InterEpoch Wi-Link IWE100-U.
"REV 0.01" and "29AG0D9116" (or something like that) appears to be silkscreened on the board in the FCC photos.