The day has arrived......
(and hopefully I have done enough homework to do this wedding justice).
On advice/feedback, I ended up using two camera's. Mine (Canon 350D with the plastic fantastic lens, 50mm) and a friends (Canon 10D, using the Sigma 10-30mm lens).
As this was my first ever wedding assignment (and probably the last - too stressful), I am pleased with the way these photo's have turned out.