Thanks the great work of simford, the G11N repositories went live today. Refer to the project page, http://www.opensolaris.org/os/project/nv-g11n
And now you could check out the input method repository from the centralized location, here are the build instructions:
1. Build IIIMF
2. Build SCIM
3. Build UIM
4. Build SunPinyin
and happy hacking. 
so great!
it's a big step for opensolaris, I'll try g11n source.
Gavin, thanks