PG and OpenSSI?

Has anybody had any experience using PG with OpenSSI (Single System Image) for 
a high-availability cluster? 

http://openssi.org/cgi-bin/view?page=openssi.html

Is this feasible? Possible? Easier/harder than other PG clustering solutions? 

-Ben 
-- 
"The best way to predict the future is to invent it."
- XEROX PARC slogan, circa 1978