More evidence regarding the benefits of green tea consumption:
Chronic green tea consumption prevents age-related changes in rat hippocampal formation.
Neurobiol Aging. 2009 May 1.
Assunção M, Santos-Marques MJ, Carvalho F, Lukoyanov NV, Andrade JP.
Department of Anatomy, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal.
The hippocampal formation undergoes considerable structural and functional modifications [...]

Another report on the life-extending properties of green tea emanating from the University of Heidelberg in Germany.
I’m pretty sure this has been covered before, but nonetheless, here’s their abstract. I don’t have access to this journal, Planta Medica, unfortunately, so I can’t tell if it had any effect on maximum lifespan, but since [...]

This study presents evidence that Epigallo-catechin gallate (EGCG), one of the major therapeutic components of green tea, significantly and markedly extends the lifespans of C. Elegans worms under conditions of heat or oxidative stress. It did not extend their lifespans under normal conditions. Once again, it starts to seem that preventing oxidative stress is good [...]