SUN to use Intel fabs - I don't think so
TI laid off 500 engineers because their 45nm process is completely developed and TI has decided not to pursue 32nm.
The recent EETimes front page article sums it up nicely:
You need to have a certain revenue (EETimes estimates 13 billion dollars PER YEAR) to be able to amortize a 32nm fab and literally only a handful of companies (Intel, Samsung and the consortium led by IBM) are expected to ever get a positive ROI out of a 32nm fab. (Note the absence of AMD from this list - the EETimes article implies that it is very unlikely that AMD will ever build a 32nm fab of its own.)
Intel has no interest to nurse an architectural competitor on its figurative breasts - after all, SPARC is one of the reasons why Itanium is not taking off as hoped. If at all, Intel would try to rent out only EXCESS fab capacity (i.e. amid one of the periodical industry slumps), but even then they'd think twice to rent it out to a competitor in the processor industry.
The reason the SUN - TI partnership worked so nicely is because
(1) TI is not a competitor in the 64 bit microprocessor market
(2) TI is (up till now) not trailing far behind with respect to fab technology
With TI gone from the 32nm market, SUN has few, if any, options to find a fab partner who is not a direct competitor.
The logical option for SUN seems to be to abandon SPARC, probably a better option than seeing it (stuck at the 45nm node) becoming outclassed by Intel's and IBM's 32nm processors.
The saying is: "Don't bring a knife to a gunfight." Trying to compete against 32nm processors with a 45nm processor is like bringing a knife to a gunfight.