Average Screen Resolution?
HNbansScience: Screen Resolution market share:
http://marketshare.hitslink.com/report.aspx?qprid=17  Resolution   Total Market Share

  1024 x 768        36.66%  
  1280 x 800        19.62%  
  1280 x 1024       12.68%  
  1440 x 900         8.30%  
  1680 x 1050        5.48%  
  800  x 600         4.49%  
  1152 x 864         2.88%  
  1920 x 1200        1.86%  
  1280 x 768         1.82%  
  1280 x 960         0.92%  
  1400 x 1050        0.72%  
  1600 x 1200        0.65%  
  1280 x 720         0.59%  
  320  x 396         0.53%  
  1366 x 768         0.24%  
  1024 x 600         0.24%  
  1360 x 768         0.21%  
  1280 x 854         0.20%  
  1152 x 720         0.14%  
  1600 x 900         0.13%  
  1344 x 840         0.12%  
  1920 x 1080        0.10%  
  2560 x 1600        0.09%
  1024 x 640         0.08%  
  Unknown            0.06%  
  640  x 480         0.06%  
  1536 x 960         0.06%  
  240  x 320         0.05%  
  1600 x 1024        0.05%  
  240  x 160         0.04%