If they do it's probably a joke. My company offers us employees Dell's corporate discount. Every item they had I could get a better deal through their home/home office section.
For example they would have a laptop for $1500.
In the corporate discount section, If you got the 3 year in-home warranty they gave you 10% off. So it would be $1350 for the laptop plus $350 for the warranty. $1700 total.
In the home section the laptop might be $1500 but they would have a free upgrade to a dvd/cdrw combo drive and a $150 mail in rebate. The 3 year mail in warranty would be $200. So it would be $1700 also, but after the mail in rebate it would be $1550 and the notebook would have a dvd/cdrw combo drive instead of a cd-rom.