I finally managed to publish XAdES4j. It is at http://code.google.com/p/xades4j/.
XAdES4j is a Java library for XML Advanced Electronic Signatures (XAdES) services. It enables producing, verifying and extending signatures in the main XAdES forms: XAdES-BES, XAdES-EPES, XAdES-T and XAdES-C. Also, extended forms are supported through the enrichment of an existing signature.
Check it out!