Anandtech posted a story that HP is significantly reducing the price of the WiFi TouchPad in order to clear all inventories of the tablet.
The 16GB WiFi TouchPad will sell for $99, while the 32GB version will be reduced to $149.HP TouchPad Reduced to $99 and $149
The price reduction is supposed to go into effect tomorrow, however a number of etailers jumped the gun yesterday. At this point I don't believe there is a way to order a TouchPad online at either of those prices - nearly all of the online sources that listed the reduced prices are now out of stock.
If you missed the opportunity yesterday, there's always the brick and mortar stores as soon as they open tomorrow.