1) Find line to line correspondence. Get mapping with author of the line.
Findbugs + update it into Bugzilla reports with corresponding author information.
2) JDepend gives you complexity of Code and Design quality.
Find checking relationships and patterns from CVS mining. Then decide about Coupling and Cohesion. Could there be a potential complementary analysis that can help better evaluation of code?
3) BIRT is a cool project that helps you access and format and create reports from BUGZILLA.
Integration of bugzilla with other analysis and reporting techniques and grouping and observing change patterns can be done.