Currently, I have the unlimited web and personal email plan ($29.99/month) with my 3G Droid X. I wish to get my company email on my mobile. I was told I could do that with an additional charge of $15/month. The website (or the service rep) is not very clear what package I will fall under. My question is: will I lose the unlimited data plan if I did that? I'd rather not lose it, obviously!
I think your best bet will be to call in and discuss with a rep if you can get on the old Corporate E-mail + Unlimited Data plan for $45/month. Have you tried to set up your company e-mail on your phone? Many setups don't require the corporate plan. Only Exchange servers and similar solutions.