Sega has told Eurogamer that the West won't be getting a Bayonetta demo until nearer it's release in Q1 2010.
Sad faces? Not quite. Sega are releasing a taster of it on the Japanese PS Store next week. So turn that frown upside down and go nuts next week with Sarah Palin Bayonetta, as long as you have a JP PSN.
More through the link. It was due to release this month for PS3 and 360 in the West, but it got delayed. Japan still gets it this year though.