I've started weightlifting and I decided it would be fun to track my progress with a graph. My weight lifting progress. Since I've just started there isn't much there. The fun part is that Google is generating the graph picture for me and also that I've written some javascript to quickly craft the chart data from timeseries represented as arrays.

  var deadlift = [40, 80];
  var squat = [40, 70];
  var bench = [40,60];
  var press = [40];
  var clean = [40];
This sure beats trying to edit the chart api by hand after each workout. The javascript also takes care of scaling the axis and labels properly based on the entered data. Yet another thing that would be a pain to edit each and every time. View source on the chart page for details.
http://chart.googleapis.com/chart?cht=lxy&chs=600x300&chtt=Lifting+Progress&chxt=x,y&chdl=Deadlift|Squat|Bench|Press|Clean&chco=ff0000,00ff00,0000ff,ff00ff,00ffff&chdlp=t&chxr=0,1,2,1|1,40,80,10&chds=1,2,40,80,1,2,40,80,1,2,40,80,1,2,40,80,1,2,40,80&chd=t:1,2|40,80|1,2|40,70|1,2|40,60|1|40|1|40