Blocked for three years, Google’s Blogspot hosting service is now accessible to mainland users. And Google Cache is operational again as well.
Filtering still seems to be taking place on a keyword level (cached copies of certain documents will load only partway before cutting off). And from comments around the net, it appears that these sites are still being blocked by certain ISPs. In Beijing, Blogspot and Google Cache are accessible through Beijing Netcom; Beijing Telecom probably not. Elsewhere is anybody’s guess.
See also Playin’ with IT (Chinese)