I've also noticed (tried adding it to cart online) that the 25% corporate discount on accessories does not apply to the lapdock either.
Here are the requirements for the $100 rebate (according to the rebate form)
1. You have to have either the $50/5GB or $80/10GB data plan
2. Data packages less than $50 and data package combinations are not eligible
3. Eligible data package must remain active for at least 30 consecutive days
4. Lapdock and Droid Bionic must appear on the same receipt.
sux. i was hoping i could use my 25% coupon too. oh well. someone just needs to hack the wife tether soon.