Max Ross (lead) always wanted to support JPA before going final. And he needs the JPA 2 criteria API for that. Until then you won't see the beta out. 
Also he works for Google, so you might never see the beta out period :) 

On  Jun 29, 2009, at 11:14, Ruben Jarque wrote:

Hello,

Hibernate Shards is still in a beta version, and I have checked the project has not had too much activity in the last two years. Are expected new releases in a near future? Have the goals of the project been integrated in other project?

--
Rubén Jarque
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