I suppose but 200 new SPARC boxes seems like a lot for that if the Opteron boxes are running Solaris too.
BTW, I wonder why Sun doesn't have an IA32-EL equivalent to run SPARC binaries on AMD64/Solaris. Transitive is supplying "Rosetta" to Apple to run PowerPC binaries on x86 Macs and reports it has a lot more deals in the works. I wonder if SPARC-on-AMD64-under-Solaris is one of them.