Do Slashdot:

An anonymous reader writes " According to the patent application--filed in mid-November by Paul Vick, lead architect for Visual Basic .Net at Microsoft; Amanda Silver, a program manager on the Visual Basic team; and an individual in Bellevue, Wash., named Costica Barsan--the IsNot operator is described as a single operator that allows a comparison of two variables to determine if the two point to the same location in memory." This article continues the tale started last november, and here is an eWeek story on the same subject.