Continuum, a Web2.0 application for visualising faceted temporal data, by Paul André, Max Wilson, Alistair Russell, Daniel Smith, Alisdair Owens and m schraefel of Southampton University.
Among its many points of interest, sections of a timeline can be brought into close proximity so that relationships can be conveniently mapped, omitting the intervening time. In the illustration above, works by Bach are connected to performances by Glenn Gould.
On the right of the illustration can be seen sliders which control the level of detail of different facets of the data independently of one another.
A video of the work can be seen here:
A paper about it is here:
Continuum: designing timelines for hierarchies, relationships and scale (2007)
André, P., Wilson, M. L., Russell, A., Smith, D. A., Owens, A., and schraefel, m. 2007. Continuum: designing timelines for hierarchies, relationships and scale. In Proceedings of the 20th Annual ACM Symposium on User interface Software and Technology (Newport, Rhode Island, USA, October 07 - 10, 2007). UIST '07. ACM, New York, NY, 101-110.