Allow JQL to query other Atlassian products

Sometimes it is helpful to look for issues in Jira that have certain relationship between other elements in other Atlassian products. For example, doing a search to list all Jira issues that do not have a Crucible code review associated with them. As I understand it this is not currently possible.

Where one of the strengths / selling points of Atlassian products is their integration with Jira this seems like a logical extension to the current JQL APIs.