Found a great site today - Quick Armory. The achievement system works like a charm - it utilizes Firefox + GreaseMonkey to grab your stats and then it outputs a couple of graphs along with a day by day calendar of what achievements you have earned. It's actually quite amazing.
So, here's my cumulative points by date (click to enlarge):
And here's my points on each individual date (you can see where I took some time off prior to Wrath as there is a large gap right there):