I wouldn't mind updating the graph on the Hansen 1988 prediction page:

Eg - it only goes to 2005. A skeptic objection to this is if you extend it to 2010, the discrepancy between Hansen's projections and observations are more stark. So my questions:

• Before I reinvent the wheel, has anyone plotted Hansen's scenarios vs the latest GISS data? Unfortunately the annual figures end at 2009 - perhaps a 12 month average going right up to Aug 2010 would be good for a up-to-date comparison
• I seem to recall reading on Real Climate that Scenario B projected CO2 emissions higher than observed while Scenario C projected CO2 emissions lower than observed. Do I remember this right?
  
• I've heard somewhere that Hansen used a climate sensitivity of 2C per doubled CO2 in his 1988 paper and a climate sensitivity of 4C per doubled CO2 in his 1981 paper. Can anyone confirm this? 

BTW, here's Hansen's prediction in 1981:

I started the Advanced rebuttal on this subject and covered a lot of those issues.  Gavin Schmidt did indeed update the temperature graph at the end of '09 (included in my rebuttal).  And the '88 paper assumed a sensitivity of 4.2°C (not sure about the '81 paper).  And the Scenario B total forcing is apparently 10% higher than reality (which I'm trying to verify in the Advanced rebuttal - CO₂ was almost spot-on but other GHGs were too high in Scenario B).

Anyway, I've still got a lot of work to do on the Advanced version (right now it's basically incomprehensible because I was mostly just putting the relevant graphics in there and trying to figure out the forcing formulas, then I got sidetracked on mid-century cooling), but feel free to take a look.