Which blade server cuts it? When the InfoWorld Test Center called forth challengers for our latest server-blade duel, four answered -- yet only three showed up to do battle: Dell, HP, and Sun. The no-show was IBM, which inexplicably backed out at the very last minute. Jump to whatever conclusions you like there. As for the testing among the remaining trio, analysts Brian Chee and Paul Venezia discovered a rennai Which blade server cuts it? When the InfoWorld Test Center called forth challengers for our latest server-blade duel, four answered — yet only three showed up to do battle: Dell, HP, and Sun. The no-show was IBM, which inexplicably backed out at the very last minute. Jump to whatever conclusions you like there. As for the testing among the remaining trio, analysts Brian Chee and Paul Venezia discovered a rennaisance under way in the world of blades as the technology continues to evolve toward enterprise-worthiness — especially with the increasing popularity and viability of virtualization.Open source yield better code: Senior Editor Neil McAllister takes a look at the business strategy of Aras, a company that recently open-sourced its suite of product development and planning software — which run exclusively on Microsoft. Surprising? Perhaps. But the company finds that when it can spend more time on developing code than counting its software licenses, the creates greater demand for its products — and revenue through support services. Technology Industry