With the release of Jersey 1.9.1, "conference-driven development" (CDD) is not an empty word. In his blog post Martin shares the Jersey-based JavaOne OAuth Hands-on Lab requirements that lead to this release while the full release notes are here.
Meanwhile, Grizzly 2.x is making good progress and the latest trunk includes integration of Jean-François' Async HTTP Client Library (AHC). Ryan, from the Grizzly team, details the status of the ongoing work on his blog, including plans for a Grizzly bundle that includes the HTTP Codec library (grizzly-http), the AHC library and its Grizzly provider. This should all be out in stable form by Grizzly 2.2.