Lucene/Solr hosting
Large customer pages using enterprise-CMS software often provide solr/lucene-connectors for page search. Often these connectors are also used to replace complex SQL queries to speed up page generation.
I think it would be great to provide hosted lucene instances to the customers.
Beside the creation of instances it should be possible to create shards for the instances and define mapping, language, custom language additions and keyword boosting.