A couple of weeks ago, someone started a thread about a pedals stuck to a crank.
Someone responded with a link to Sheldon Brown's site. Sheldon recommended heating the crank and then giving the pedal a pull with the wrench.
I had tried everything - soaking in ammonia, soaking in oil, torquing the living crap out of the wrench on the pedal - no budge. I rebuilt the pedal as best as I could with the old parts, but the cones were pretty trashed.
Well, I tried Sheldon's suggestion, put the crank in a vice, heated the crank arm, and gave the wrench a hard pull. To my surprise, "CREEEEEAK, the pedal budged! I couldn't believe it. Well, to make a long story short, the old crank is off at last and a new one is on.
Cool. Thanks again, Sheldon. I don't know how many times you have given me/us good advise, but this is yet another one I owe you.