To all the people rushing to buy an iPad, you should know that Apple makes as much as 52% profit margin on the iPad. The devil is in the details.
BOM (Bill of Material) for iPad.
16GB iPad with WiFI costs US$270 which retails for $499. The margins go up further if you add a 3G Module or high capacity.
Expect other vendors to launch products to compete with iPad with more aggressive pricing.