Ability to filter activity streams by "Message" in view?

Hi there,

This is a really great module. One request I have is whether it would/could be possible to allow the admin user to add a filter of type "Message" to the Filters in views? They could then expose the filter, so that effectively it becomes a search field for the end user which searches the entire Activity message, rather than by user id, operation or type separately.

We are interested in implementing this, however only really want to work on it if it would be useful and could be adopted into the module. Is there any reason this isn't already available as an option? Would you be interested in having this functionality?

Many thanks :)