The W3C XML Security Working Group has released a Last Call Working Draft for XML Signature 1.1:http://www.w3.org/TR/xmldsig-core1/
An explanation of the changes against the XML Signature 1.0 specification is available:http://www.w3.org/TR/xmldsig-core1/explain.html
Changes are focused on the set of mandatory to implement algorithms and markup for relevant key material.
The Working Group has also released a Last Call Working Draft for XML Signature Properties:http://www.w3.org/TR/2010/WD-xmldsig-properties-20100204/
The Last Call period lasts until 18 March 2010; comments can be sent to public-xmlsec-comments @ w3.org. The next step in the W3C Recommendation Track process is either a Candidate Recommendation phase to collect implementation experience, or another Working Draft.
The WG continues its work on XML Encryption 1.1 and is also working on a 2.0 version of Canonical XML and XML Signature.
Details on all the publications of the Working Group are available on the Working Group Publication Status page at http://www.w3.org/2008/xmlsec/wiki/PublicationStatus