Thanks to Ed's fabulous job on SRU and CQL-Parser I was able to easily add in two features.
Firstly, I've contributed an SRU Catalyst plugin. Working with Catalyst has been a joy and now adding in an SRU interface is just as easy.
Secondly, I was able to (in a matter of minutes) hack in support for converting CQL queries to Lucene queries. This means that i can now pass SRU searches (which use CQL query syntax) off to a Lucene web service.
