With the following putback:
PSARC 2006/373 Dynamic Lun Expansion
6241086 Format should allow label adjustment when disk/lun size changes
6430818 Solaris needs mechanism of dynamically increasing lun size
OpenSoaris now has the ability to detect and use space that is dynamically allocated to a LUN. This has been a bit of a stumbling block in the past, and the available solutions to expand storage weren’t for the faint of heart. Hopefully this feature works as advertised!!