The Sentry team has released a new Java agent that enhances stack traces by adding local variable names and values to each frame, providing more detail about the application's state at the time of an error. The agent is currently in beta and needs user feedback. To use it, download the latest version from Github, configure your Java application with the `-agentpath` argument, and install the Sentry Java SDK. Once configured, the agent will automatically enhance events where applicable. The team encourages users to share their feedback and suggestions for improving the new Java agent.