The 4.0.4 iteration of Ice Cream Sandwich for the Samsung Nexus S 4G for Sprint was recently leaked. From early reports, the build is extremely solid and, in fact, was described as "release quality". Everything seems to be working fine, including the WiMax radio. From the looks of the build, many folks are speculating that the OTA release should be very soon, but there is no official confirmation on that. We will keep a close watch on this to let you know as soon as we know more.

Source: AndroidCentral