That is a good news.
But I can not go to there. while you can, it is a good opportunity for learning some Bayes Theory.
BTW, I have subscribed several papers to SAS Global Forum 2012.I don't know whether they will be acceptted.
Now I want to say some thing about your example above .
The word 'they' is vey high frequent word, so the probability of typing it wrong is very low. That is to say when
someone type 'thay' ,what he want maybe is 'thaw'.
The word people type wrong is usually strange or novel. So the word people actually want maybe is some word
which has low probability not high.
Like:
economtric => econometric
v.s.
economtric => economic
So that is the reason I agree with it at sometime , another time disagree.