As of some time this afternoon, Wikipedia has been completely acessible in Beijing, the first time it’s been available in China in almost exactly  a year.  Commentors on the chinese-forums website have reported that they can access it. It is too early to tell whether this is a permanent arrangement or just a temporary leak in the firewall. 

It has, however, already been several hours since it came back online, and a quick scan finds that a number of  pages on some of the more sensitive issues are available. Intriguingly though, trying to access certain pages (e.g. those on events in 89) results in acccess to the entire site being denied.  This is similar to the block that occurs when users search for sensitive keywords on google.  Google immediately becomes off limits for that user.  Could it be that authorities have spent the last year sifting through and cataloguing the millions of entries on Wikipedia and have finally decided to allow access to the non-sensitive ones?