Shibboleth IdP 2.0 Release Candidate 3 (3-Mar-08)
* RegexSplit and Prescoped attribute definitions
* Exposure of attribute authorities as services
* Exporting of all services into the ServletContext
* Default configuration updates
* Lots of bug fixes

Shibboleth IdP 2.0 Release Candidate 2 (19-Feb-08)
This release candidate was a bug fix release and did not include any new functionality

Shibboleth IdP 2.0 Release Candidate 1 (23-Jan-08)
The following additional functionality is available in this release candidate:
* Persistent, Computed, and Transient Identifiers
* Data connector failover
* Tons of bug fixes

Shibboleth 2.0 Beta 2 (19-Nov-2007)
The following functionality is available in this release:
* Authentication
  - Remote User based authentication
  - Username/Password based authentication using JAAS modules

* Profiles
  - Shibboleth SSO, SAML 1 Attribute Query, SAML 1 Artifact Resolution, SAML 2 SSO, 
    SAML 2 Attribute Query and SAML 2 Artifact Resolution

* Security
   - Security policy code for:
     * message issue instant checking
     * message replay detection
     * SAML protocol messages with digital signatures
     * SSL/TLS client cert authentication
     * SAML SimpleSign messages
  - Digital signing of assertions
  - Encrypted NameID and Assertions
  - Reading of inline and filesystem-resident cryptographic credentials

* Attributes
  - Static, LDAP, and relational database data connectors
  - Simple, principal name, authentication method, scoped, scriptlet, mapped, template, 
    and transient ID attribute definitions
  - Direct and transient principal connectors
  - SAML 1 Attribute and NameIdentifier and SAML 2 Attribute and NameID attribute encoders
  - Attribute filter policy functions of: AND, OR, NOT, ANY, Attribute requester, issuer, 
    value, principal name, authentication method string and regular expression matching, 
    sciptlet, number of values, and attribute request and issuer in SAML metadata group

* Misc
  - A new logging framework based on Logback (logback.org) with a new logging configuration 
    file, $IDP_HOME/conf/logging.xml
  - File, HTTP, file-backed HTTP, and chaining metadata providers