If they don't try to get it into the corporate market they'll miss a ton of revenue. Almost everyone I know that has an all-in-one device got it from their employer.
If it's more expensive than blackberry and palm, and in turn gives you a hipper design and ability to play mp3 and videos, then it's clearly not marketed to corporate.
I'll give Apple the benefit of the doubt that they're attuned to their consumer market and know how to introduce and sell product to them.