Google has been using Google.cn for Chinese market for a while and it just launched a better domain yesterday: G.cn as shown in whois record:
Domain Name: g.cn
Whois Server: whois.cnnic.net.cn
Domain Status: clientDeleteProhibited
Domain Status: clientTransferProhibited
Registrant Organization: Google Ireland Holdings
Registrant Name: Google Ireland Holdings
Sponsoring Registrar: MarkMonitor, Inc.
Registration Date: 2003-03-10 19:58
Expiration Date: 2012-08-24 17:48
However, we are not able to access either Google.cn or G.cn right now.
This would definitely be helpful for Google to increase its traffic as many Chinese companies have benefited from using single-letter domains.