These two have been working togeter for quite sometime now. This is from Oct 2006

<SAN JOSE, Calif.--Sun Microsystems and Fujitsu engineers on Tuesday promised significant performance increases with two next-generation chips, models that they hope will help keep the Sparc line relevant.

Both processors, Sun's eight-core Niagara 2 and Fujitsu's dual-core Sparc64 VI, run Sun's Solaris operating system. However, they are aimed at different markets. Niagara 2 is for lower-end servers running Java or Web server software, while the Sparc64 VI works in higher-end servers with numerous processors that can handle tasks such as working with massive databases.

Company representatives speaking at the Fall Processor Forum here promised significant gains over the chips' predecessors--the first Niagara (now called UltraSparc T1) and the single-core Sparc64 V. >

The question is whether new product development with Sun would be allowed under the Fujitsu license. Perhaps that is the reason they Fujitsu paid as much as they did - to allow continued development of specific product lines with Sun? Other thoughts? Opty