Dissapointed with 8800???? Not at all. Its my 4th blackberry and by FAR the best. I love this device.
Of the many features in the 8800, the trackball is so much easier and quicker to use than the trackwheel. I know the trackball is in the Pearl as well, but in my opinion, a "PDA" without a full keypad defeats the purpose. You might as well buy an phone on the market if you are going to get the Pearl - Nokia makes a bunch of great phones with practically all of the features of the Pearl and smaller.
Just my 2 cents...