This CRN article reports that Microsoft is acquiring Connectix:
The software giant, which is expected to formally unveil the deal Thursday, will use the technology to allow customers to carve out multiple partitions on a single Intel-based server, allowing them to run multiple instances of a single operating system and multiple workloads.
While Microsoft seems most interested in Connectix's Virtual Server software, which allows multiple instances of an operating system to be running... Connectix also publishes Virtual PC -- a Windows emulator for the Macintosh platform.