This FOSS networking looks interesting e.g. OpenflowSwitch movement http://www.openflow.org/ http://mvdirona.com/jrh/TalksAndPapers/JamesHamilton_CleanSlateCTO2009.pdf
Trying to open the network stack -networking is where mainframe was years ago (proprietary everything
SANs are just fighting the ASIC vs. x86 battle now too e.g. http://blog.nigelpoulton.com/3par-v-class-the-best-just-got-better/#comments
http://opennetsummit.org/ perhaps when its all converged it will be all commodity hardware running FOSS?