I spoke with our guide on Wednesday about it and with a 100-159 pt add-on you get 4 adult standard AP vouchers, with 160+ pt add-on you get 8 adult standard AP vouchers. If you choose DL vouchers they do expire, I believe sometime in 2011. If you choose WDW vouchers they never expire. Depending on how much you put down and whether you finance it or not, there could be as much as a 14 month waiting period before they give you the APs. They basically want to recoupe their costs so if you put down a large down payment your wait is much less. Obviously if you pay cash you get them right away.
You also have the option of taking a cash discount in lieu of the APs, something like $1600 for 100-159 pt add on and $2400 for 160+ add on. We were thinking of doing a 160 pt add-on so the value of 8 adult APs would be more than the $2400 cash discount, around $3200 for 8 APs.
Also, since we have a March UY we would also get free 2009 points that can be banked immediately.
You do pay full price, $112/pt, for taking advantage of these incentives but in our case the incentive value totals almost $5000 if we assume the value of the 2009 points is around $10/pt so that effectively brings the cost per point down to around $82/pt. That's less than many AKV resales right now. Its a very tempting offer and I'm having a hard time resisting