One of the most anticipated debuts of a startup company happens today when Nicira, a maker of network virtualization software, comes out of stealth mode.

The world of hypervisors is complicated by the fact that there are proprietary and open source tools, each with different strengths and weaknesses.

Riverbed today announced the release of updates to its Steelhead network performance products as well as its Granite product line, which is based on the edge virtual server infrastructure approach that Riverbed is pushing. Whereas the former aims to boost network performance for the customers that are concerned about application delivery, the latter may attract more attention from the infrastructure management industry.

SSD-maker Micron Technology announced it has signed an agreement to purchase Virtensys, a maker of PCIe virtualization appliance.