Mule 1.0-rc3 includes a New Security infrastucture, new transports such as Jdbc, Ssl and Xmpp (Jabber) an improved transaction managament, new routing capabilities, and a load of new enhancements and bug fixes.
You can download the latest release here.

Security Manager (beta)
Mule has a new security infrastucture that enables endpoint authentication and UMO Component level authorisation. There is a default Security implementation that uses Acegi security for Spring that supports JAAS, LDAP, CAS (Central Authentication Server and DAO mechanisms. Also, More support for encryption and encoding has been added.
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Jdbc Provider
the Jdbc Provider introduces Mule Endpoint-style access for any Jdbc compiant database. It also supports User and Xa transactions.
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Ssl Transport Provider
The Ssl transport enables secure socket communications.
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Xmpp (Jabber) Transport Provider
The Xmpp transport enables events to be sent and received over the Jabber protocol.
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Transaction Management
Mule transaction management has been rewritten to simplify Transaction configuration including XA transactions.
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Plexus Support
The Plexus container can now be used to wire your UMO Components and provide services to other Mule object.
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Response Router
A Response router is a new type of router that can be used to introduce asynchronous processing to request/response calls. Events can be fired concurrently and the Response router will aggregate results before returning a response. [Read More...]

Http Improvements

• Https is now supported
• The Http receiver supports HTTP 1.1 Keep-Alive meaning that sockets can be kept open over multiple requests.
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Axis Improvements

• We have optimised Axis Http for Asynchronous requests
• Support for Doc/Lit style services
• Can control WSDL generation by setting WSDL properties on the UMOComponent
• Axis 1.2-RC3 supports proper Auto type mapping, which is enabled by default in Mule.
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Bug fixes, Tests and Documentation
There have been loads of bug fixes and new tests added to Mule. Plus new and updated [documentation].

I would like to thank everyone who reported issues and ideas and helped fix bugs. Special thanks go to -

• Guillaume Nodet For all his work on transaction managment and Jdbc support.
• Brian Topping for helping the move to codehaus and for the Plexus support.
• bobo bob for hosting Mule at the codehaus.
• Peter Braswell for the Xmpp Transport.

Reported Issues Fixed in Mule

Reported Issues Fixed in Mule Extras