Oct 28, 2013 Update.
The local Toyota dealer quoted $2,200 to replace the dash. The National customer center offered to refund half that amount if I did the repair (they said they knew this was my first Toyota and wanted to make a good impression). I said that was still a tidy sum for a relatively small crack - I then mentioned a "clunking sound" that the dealer had diagnosed as a drive shaft issue (known issue where the fit is too tight and when it releases it clunks). They said they'd totally cover the drive shaft replacement as an alternative to the dash replacement. The drive shaft work was completed and I received a $540 reimbursement check from Toyota for the repair last week. I suppose I left money on the table by trading a $1,100 partial reimbursement for $540, but my ultimate out of pocket is zero.
Impressed with the customer service! They clearly stated that this was outside their normal process, and that they couldn't necessarily do this for others, so Your Mileage May Vary....
It also implies that perhaps they are close to acknowledging there is a real issue with the dash materials. So keep filing the complaints!