For anyone interested, I've assembled the appropriate POMs and bundles, and the Maven team uploaded them to the ibiblio repository today.   The artifacts for all saxon 8.7 libraries may be found here:

http://www.ibiblio.org/maven2/net/sf/saxon/

These artifacts are deployed under groupId "net.sf.saxon", and a relocation record has been placed under the old (now obsolete) groupId "saxon".  To include a dependency on saxon 8.7 in a Maven 2 pom.  You may now use the following dependency XML:

<dependency>
  <groupId>net.sf.saxon</groupId>
  <artifactId>saxon</artifactId>
  <version>3.7</version>
</dependency>

Artifacts uploaded:

saxon
saxon-dom
saxon-jdom
saxon-sql
saxon-xom
saxon-xpath