amalgalite version 0.6.0 has been released.

http://copiousfreetime.rubyforge.org/amalgalite/

=== Major Enhancements

* Added ability to define custom SQL functions implemented in Ruby
* Added ability to define custom SQL aggregates implemented in Ruby
* Added support for Ruby busy handlers
* Added database 'interrupt' support
* Added support for Ruby progress handlers

=== Minor Enhancement

* update to SQLite version 3.6.7