Is anybody aware of any Twitter/Identica like microblogging opensource engine written in Java. My basic requirement is that user should be able to 1) Write short comments on some entities in the web application 2) Privacy features like do not show name/email 3) Like/dislike a comment 4) Optionally, track user location
Most of the ones in found were in ASP.net (Yonkly), PHP(StatusNet,Floopo,Jisko) or Python(Jaiku). Thanks